Guide GUI's are all blank gray boxes, something is wrong....

Hello everyone!

Well I have an issue with Guide GUI's. I will run a GUI based program and it will display a gray box the correct size, but it has nothing in it, all the buttons or displays or plots do not show up at all. It remains an empty gray box...

I have tried a few different GUI's and even made one with all of them having the same result. I run MATLAB on a linux, I know I have had the GUI's working in the past, but now they don't. I'm not sure what changed, it could of been in an automatic update, I don't know.

This is a post found that looked similar, but it did not seem to really answer how to fix the issue:

http://stackoverflow.com/questions/16114951/when-i-run-guide-in-matlab-it-opens-a-blank-all-gray-window-whats-going-on

It happens to all GUI's so I did not think I needed to add code. I did try looking it up too, I found others with the same issue (it looks like it could be some type of Java issue, but I'm not sure), but did not really find a way to fix the issue.

Any help will be very appreciated!!!

Please if you know how to fix it, let me know!

[Geoff Hayes]

Which version of java are you using? The link that you provided mentioned how that may be a problem.

[Chris E.]

Well when I put in the command, "version -java", I get:

Java 1.7.0_51-b13 with Oracle Corporation Java HotSpot™ 64-bit Server VM mixed mode

I hope that helps, thank you!

[Ilham Hardy]

Based on the link you gave, that, Java version 7, is the problem.

If possible try to downgrade the java, and check whether the probel persist.

[Chris E.]

Well I will try to downgrade it, thanks!

Answer 1

[Chris E.]

It was the Java! I reinstalled Java 6 and it worked fine!

Answer 2

[Jack]

Hi. This is my prlbem:

When I connect java to new java (version 6) and run it I have this error :

Fatal Error on startup: Cannot locate or initialize class com/mathworks/jmi/OpaqueJavaInterface. java.lang.UnsupportedClassVersionError: com/mathworks/jmi/OpaqueJavaInterface : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

I'm downgrading java 1.7 of Matlab R2014a to 1.6

Thanks.