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    253. 

  253. <article class="doc">
    254. 

  254. <h1 class="page">troubleshooting</h1>
    255. 

  255. <div class="sect1">
    256. 

  256. <h2 id="troubleshooting-jmonkeyengine3-sdk"><a class="anchor" href="#troubleshooting-jmonkeyengine3-sdk"></a>Troubleshooting jMonkeyEngine3 SDK</h2>
    257. 

  257. <div class="sectionbody">
    258. 

  258. <div class="sect2">
    259. 

  259. <h3 id="graphics-card-driver"><a class="anchor" href="#graphics-card-driver"></a>Graphics Card Driver</h3>
    260. 

  260. <div class="paragraph">
    261. 

  261. <p><strong>On Windows and Linux make sure you have the latest driver installed. Make sure its the one supplied by the card manufacturer and not just the <abbr title="Operating System">OS</abbr>-default one.</strong> On OSX, make sure you have the latest update for your MacOS.</p>
    262. 

  262. </div>
    263. 

  263. </div>
    264. 

  264. <div class="sect2">
    265. 

  265. <h3 id="stability-graphics-issues"><a class="anchor" href="#stability-graphics-issues"></a>Stability / Graphics issues</h3>
    266. 

  266. <div class="paragraph">
    267. 

  267. <p>On some Linux and Windows systems, the SDK might perform unstable and quit with native VM crashes or &#8220;x&#8221; errors. There are a few things one can try to remedy those issues.</p>
    268. 

  268. </div>
    269. 

  269. <div class="sect3">
    270. 

  270. <h4 id="heavyweight-canvas"><a class="anchor" href="#heavyweight-canvas"></a>Heavyweight Canvas</h4>
    271. 

  271. <div class="paragraph">
    272. 

  272. <p>First of all theres the new &#8220;OpenGL&#8221; settings page in the SDK global settings where you can enable the &#8220;Heavyweight Canvas&#8221;, which solved some issues for some people. The settings panel can be found under <code><span class="menuseq"><b class="menu">Tools</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="menuitem">Options</b></span></code> on Windows and Linux and in the main menu (or by pressing Apple-Comma) for MacOSX.</p>
    273. 

  273. </div>
    274. 

  274. <div class="paragraph">
    275. 

  275. <p>If you cannot start the SDK, edit the file <code>config/Preferences/com/jme3/gde/core.properties</code> in the SDK settings folder (see above). If it doesn&#8217;t exist, create the file including all folders. Add the line <code>use_lwjgl_canvas=true</code>. To try OpenGL1 compatibility mode (works for both canvas settings) add <code>use_opengl_1=true</code>.</p>
    276. 

  276. </div>
    277. 

  277. </div>
    278. 

  278. <div class="sect3">
    279. 

  279. <h4 id="look-and-feel"><a class="anchor" href="#look-and-feel"></a>Look and Feel</h4>
    280. 

  280. <div class="paragraph">
    281. 

  281. <p>The <abbr title="Operating System">OS</abbr>-built-in look and feel might cause issues, you can change the LAF by using the appropriate command line switch (or add it to the [app folder]/etc/jmonkeyplatform.conf file, without the &#8220;- -&#8221; prefix).</p>
    282. 

  282. </div>
    283. 

  283. <div class="listingblock">
    284. 

  284. <div class="content">
    285. 

  285. <pre class="highlightjs highlight"><code>--laf javax.swing.plaf.nimbus.NimbusLookAndFeel</code></pre>
    286. 

  286. </div>
    287. 

  287. </div>
    288. 

  288. <div class="paragraph">
    289. 

  289. <p>or alternatively</p>
    290. 

  290. </div>
    291. 

  291. <div class="listingblock">
    292. 

  292. <div class="content">
    293. 

  293. <pre class="highlightjs highlight"><code>--laf javax.swing.plaf.metal.MetalLookAndFeel</code></pre>
    294. 

  294. </div>
    295. 

  295. </div>
    296. 

  296. </div>
    297. 

  297. <div class="sect3">
    298. 

  298. <h4 id="compiz"><a class="anchor" href="#compiz"></a>Compiz</h4>
    299. 

  299. <div class="paragraph">
    300. 

  300. <p>Compiz on Linux might cause issues, if you set its rendering quality to &#8220;Medium&#8221; these should go away.</p>
    301. 

  301. </div>
    302. 

  302. <div class="ulist">
    303. 

  303. <ul>
    304. 

  304. <li>
    305. 

  305. <p><code><span class="menuseq"><b class="menu">Appearance</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="submenu">Set Special effects to</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="menuitem">&#8220;Medium&#8221;</b></span></code></p>
    306. 

  306. </li>
    307. 

  307. </ul>
    308. 

  308. </div>
    309. 

  309. </div>
    310. 

  310. </div>
    311. 

  311. <div class="sect2">
    312. 

  312. <h3 id="updating-problems"><a class="anchor" href="#updating-problems"></a>Updating problems</h3>
    313. 

  313. <div class="paragraph">
    314. 

  314. <p>If you have problems updating the SDK, try deleting all files from <code>jmonkeyplatform/update/download</code> and/or <code>[settings folder]/update/download</code> depending on your system (see below for the settings folder location).</p>
    315. 

  315. </div>
    316. 

  316. <div class="paragraph">
    317. 

  317. <p>If you are on Linux, check if the user you run the SDK with has access to the files in <code>jmonkeyplatform/jdk/bin</code> and that they are executable.</p>
    318. 

  318. </div>
    319. 

  319. </div>
    320. 

  320. <div class="sect2">
    321. 

  321. <h3 id="freezing-performance-problems"><a class="anchor" href="#freezing-performance-problems"></a>Freezing / Performance problems</h3>
    322. 

  322. <div class="paragraph">
    323. 

  323. <p>If the SDK starts to become sluggish and / or slow or you get unexpected freezes of the application, you can try deleting the cache folder at var/cache in the settings folder (see below for the location of the settings folder). Do this while the SDK is not running, then restart the SDK.</p>
    324. 

  324. </div>
    325. 

  325. </div>
    326. 

  326. <div class="sect2">
    327. 

  327. <h3 id="preferences-and-settings"><a class="anchor" href="#preferences-and-settings"></a>Preferences and Settings</h3>
    328. 

  328. <div class="paragraph">
    329. 

  329. <p>To completely remove and/or reinstall the SDK it is vital that the settings folder is deleted too. The location can be seen through the &#8220;about&#8221; menu and is as following for the different <abbr title="Operating System">OS</abbr>'s:</p>
    330. 

  330. </div>
    331. 

  331. <div class="ulist">
    332. 

  332. <ul>
    333. 

  333. <li>
    334. 

  334. <p>Windows: <code>C:\Userspass\&lt;username&gt;\AppData\Roaming\.jmonkeyplatform</code></p>
    335. 

  335. </li>
    336. 

  336. <li>
    337. 

  337. <p>Windows (alt): <code>C:\Users\&lt;username&gt;\.jmonkeyplatform\</code></p>
    338. 

  338. </li>
    339. 

  339. <li>
    340. 

  340. <p>MacOSX: <code>/Users/&lt;username&gt;/Library/Application Support/jmonkeyplatform</code></p>
    341. 

  341. </li>
    342. 

  342. <li>
    343. 

  343. <p>Ubuntu:  <code>/home/&lt;username&gt;/.jmonkeyplatform</code></p>
    344. 

  344. </li>
    345. 

  345. </ul>
    346. 

  346. </div>
    347. 

  347. </div>
    348. 

  348. <div class="sect2">
    349. 

  349. <h3 id="log"><a class="anchor" href="#log"></a>Log</h3>
    350. 

  350. <div class="paragraph">
    351. 

  351. <p>To see or post the error output of the SDK in the forum, you can find the log of the application in the settings folder above too, the file is called <code>var/log/messages.log</code>.</p>
    352. 

  352. </div>
    353. 

  353. </div>
    354. 

  354. <div class="sect2">
    355. 

  355. <h3 id="getting-error-messages-and-reporting-issues"><a class="anchor" href="#getting-error-messages-and-reporting-issues"></a>Getting error messages and reporting issues</h3>
    356. 

  356. <div class="paragraph">
    357. 

  357. <p>When an exception happens in the SDK, a small warning sign appears in the lower right corner of the main window. Double-click it to open a window that allows you to see the exception stack trace. When posting about issues in the forum, always post the stack trace along with a description of what happens and how it can be reproduced.</p>
    358. 

  358. </div>
    359. 

  359. </div>
    360. 

  360. <div class="sect2">
    361. 

  361. <h3 id="specifying-the-jdk-location"><a class="anchor" href="#specifying-the-jdk-location"></a>Specifying the JDK location</h3>
    362. 

  362. <div class="paragraph">
    363. 

  363. <p>You can install another JDK for use with the jMonkey SDK. You then have to specify the location manually.</p>
    364. 

  364. </div>
    365. 

  365. <div class="olist arabic">
    366. 

  366. <ol class="arabic">
    367. 

  367. <li>
    368. 

  368. <p>Go to your jMonkeyEngine SDK installation directory.<br>
    369. 

  369. Mac users right-click jMonkeyApplication.app (which actually is a directory) in the Finder and select &#8220;Show package contents&#8221;.</p>
    370. 

  370. </li>
    371. 

  371. <li>
    372. 

  372. <p>Navigate to the <code>etc</code> directory.<br>
    373. 

  373. Mac users navigate to <code>Contents/Resources/jmonkeyplatform/etc/</code>.</p>
    374. 

  374. </li>
    375. 

  375. <li>
    376. 

  376. <p>Open the file <code>jmonkeyplatform.conf</code> in a text editor.</p>
    377. 

  377. </li>
    378. 

  378. <li>
    379. 

  379. <p>Change the following line and enter the path to the JDK:</p>
    380. 

  380. </li>
    381. 

  381. </ol>
    382. 

  382. </div>
    383. 

  383. <div class="listingblock">
    384. 

  384. <div class="content">
    385. 

  385. <pre>jdkhome="/path/to/jdk"</pre>
    386. 

  386. </div>
    387. 

  387. </div>
    388. 

  388. </div>
    389. 

  389. <div class="sect2">
    390. 

  390. <h3 id="freezing-at-startup"><a class="anchor" href="#freezing-at-startup"></a>Freezing at startup</h3>
    391. 

  391. <div class="paragraph">
    392. 

  392. <p>If you&#8217;re behind a proxy or special network settings, try :</p>
    393. 

  393. </div>
    394. 

  394. <div class="olist arabic">
    395. 

  395. <ol class="arabic">
    396. 

  396. <li>
    397. 

  397. <p>Disable your network connection.</p>
    398. 

  398. </li>
    399. 

  399. <li>
    400. 

  400. <p>Launch jme sdk (may wait 30s/1min for timeout).</p>
    401. 

  401. </li>
    402. 

  402. <li>
    403. 

  403. <p>Go into <code><span class="menuseq"><b class="menu">Tools</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="submenu">Options</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="menuitem">General</b></span></code>.</p>
    404. 

  404. </li>
    405. 

  405. <li>
    406. 

  406. <p>Setup &#8220;manual proxy settings&#8221; (for some reason the &#8220;Use System Proxy Settings&#8221; option doesn&#8217;t work on some Linux distributions)</p>
    407. 

  407. </li>
    408. 

  408. </ol>
    409. 

  409. </div>
    410. 

  410. <div class="paragraph">
    411. 

  411. <p><a href="https://hub.jmonkeyengine.org/t/jme-sdk-stalls-on-startup/30555">Discussion</a> of the problem.</p>
    412. 

  412. </div>
    413. 

  413. </div>
    414. 

  414. <div class="sect2">
    415. 

  415. <h3 id="known-issues"><a class="anchor" href="#known-issues"></a>Known Issues</h3>
    416. 

  416. <div class="paragraph">
    417. 

  417. <p>For a list of known issues and possible workarounds see the following link: <a href="https://github.com/jMonkeyEngine/sdk/issues">List of known issues on github.</a></p>
    418. 

  418. </div>
    419. 

  419. <div class="paragraph">
    420. 

  420. <p>Some issue are imported from the previous googlecode:
    421. 

  421. <a href="https://code.google.com/archive/p/jmonkeyengine/issues">List of old issues on googlecode.</a></p>
    422. 

  422. </div>
    423. 

  423. </div>
    424. 

  424. </div>
    425. 

  425. </div>
    426. 

  426. </article>
    427. 

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    428. 

  428.   <div class="toc-menu"></div>
    429. 

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    430. 

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    431. 

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    432. 

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    433. 

  433. <footer class="footer">
    434. 

  434.   <p>Copyright 2020 jMonkeyEngine Wiki Contributors. Licensed BSD-3.</p>
    435. 

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