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		<title>Could not find or load main class mgui.interfaces.exec.MguiStart</title>
		<link>http://mgui.wikidot.com/forum/t-1063282/could-not-find-or-load-main-class-mgui-interfaces-exec-mguis</link>
		<description>Posts in the discussion thread &quot;Could not find or load main class mgui.interfaces.exec.MguiStart&quot; - error with mgui-mac installation</description>
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		<lastBuildDate>Thu, 10 Sep 2026 19:23:00 +0000</lastBuildDate>
		
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				<guid>http://mgui.wikidot.com/forum/t-1063282#post-2181759</guid>
				<title>Re: Could not find or load main class mgui.interfaces.exec.MguiStart</title>
				<link>http://mgui.wikidot.com/forum/t-1063282/could-not-find-or-load-main-class-mgui-interfaces-exec-mguis#post-2181759</link>
				<description></description>
				<pubDate>Tue, 16 Dec 2014 14:49:14 +0000</pubDate>
				<wikidot:authorName>typically</wikidot:authorName>				<wikidot:authorUserId>356119</wikidot:authorUserId>				<content:encoded>
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						 <p>Hi again,</p> <p>Ah, yes this is a Mac-specific issue, which has been fixed with the newest (not yet released) version. Basically, older versions of OSX (i.e., a year old or older) come with an older version of Java3D installed, which for some reason overrides the version which ships with ModelGUI.</p> <p>The new version (1.0.23) will be released very soon, but if you don't want to wait, the resolution is illustrated <a href="http://www.openifctools.org/Open_IFC_Tools/mac_java3d.html">here</a>. Basically, you need to remove the old Java3D version:</p> <p>Go to the following directory: &quot;System/Library/Java/Extensions&quot;<br /> Delete these files (if present): j3daudio.jar, j3dcore.jar, j3dutils.jar, vecmath.jar, libJ3D.jnilib, libJ3DAudio.jnlib, libJ3DUtils.jnilib</p> <p>Sorry about the confusion! Let me know if this doesn't resolve the issue.</p> 
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				<guid>http://mgui.wikidot.com/forum/t-1063282#post-2178274</guid>
				<title>(no title)</title>
				<link>http://mgui.wikidot.com/forum/t-1063282/could-not-find-or-load-main-class-mgui-interfaces-exec-mguis#post-2178274</link>
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				<pubDate>Fri, 12 Dec 2014 19:34:55 +0000</pubDate>
				<wikidot:authorName>Lea</wikidot:authorName>								<content:encoded>
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						 <p>Hi Andrew,</p> <p>thank you very much for the answer. It is improving but still not working. Now I get another exception:</p> <p>Could not initiate driver 'JDBC-ODBC', class 'sun.jdbc.odbc.JdbcOdbcDriver'<br /> Details: sun.jdbc.odbc.JdbcOdbcDriver<br /> Exception in thread &quot;main&quot; java.lang.NoClassDefFoundError: javax/media/opengl/GLCapabilitiesChooser<br /> [&#8230;]<br /> Caused by: java.lang.ClassNotFoundException: javax.media.opengl.GLCapabilitiesChooser<br /> [&#8230;]</p> <p>any idea what that means?</p> <p>Thanks again!</p> <p>Cheers,<br /> Léa</p> 
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				<guid>http://mgui.wikidot.com/forum/t-1063282#post-2177839</guid>
				<title>Re: Could not find or load main class mgui.interfaces.exec.MguiStart</title>
				<link>http://mgui.wikidot.com/forum/t-1063282/could-not-find-or-load-main-class-mgui-interfaces-exec-mguis#post-2177839</link>
				<description></description>
				<pubDate>Fri, 12 Dec 2014 09:13:26 +0000</pubDate>
				<wikidot:authorName>typically</wikidot:authorName>				<wikidot:authorUserId>356119</wikidot:authorUserId>				<content:encoded>
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						 <p>Hi Lea,</p> <p>I think the problem is that it needs to be run from the ModelGUI directory itself. Try:</p> <div class="code"> <pre><code>cd /Applications/MINC/mcgui/mgui-1.0.22-alpha-src/ ./mgui-mac</code></pre></div> <p>You could also put this in an executable bash script if you want to run it from elsewhere.</p> <p>Let me know if you're still having problems! I plan to include OS-specific installers for the next release, to avoid these issues.</p> <p>Cheers,<br /> Andrew</p> 
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				<guid>http://mgui.wikidot.com/forum/t-1063282#post-2177496</guid>
				<title>Could not find or load main class mgui.interfaces.exec.MguiStart</title>
				<link>http://mgui.wikidot.com/forum/t-1063282/could-not-find-or-load-main-class-mgui-interfaces-exec-mguis#post-2177496</link>
				<description></description>
				<pubDate>Thu, 11 Dec 2014 23:03:11 +0000</pubDate>
				<wikidot:authorName>Lea</wikidot:authorName>								<content:encoded>
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						 <p>Hello,</p> <p>I have installed mgui 1.0.22-alpha on a Mac OSX 10.8.5, and I have installed java 3D jkd1.8.0.<br /> When I try to run mgui-mac, I got the following error:</p> <p>mac-5brown:~ lea$ /Applications/MINC/mcgui/mgui-1.0.22-alpha-src/mgui-mac ; exit;<br /> Error: Could not find or load main class mgui.interfaces.exec.MguiStart<br /> logout<br /> [Process completed]</p> <p>What is the problem and how can I fix it?<br /> Thank you</p> 
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