MATLAB Answers

Error when using uigetdir() in deployed MATLAB application (java.lang​.IllegalAr​gumentExce​ption: eval requires a valid MCR id when running in standalone mode)

56 views (last 30 days)
When calling uigetdir() in a deployed application I get this error sometimes, seemingly more often than not. I can't seem to find anything about this online.It might be related to my resent switch to 2018a.
Error using matlab.ui.internal.dialog.FolderChooser/doShowDialog (line 70)
Java exception occurred:
java.lang.IllegalArgumentException: eval requires a valid MCR id when running in standalone mode.
at com.mathworks.jmi.NativeMatlab.PostMatlabMessage(Native Method)
at com.mathworks.jmi.NativeMatlab.postMatlabMessage(NativeMatlab.java:224)
at com.mathworks.jmi.NativeMatlab.postMatlabMessage(NativeMatlab.java:240)
at com.mathworks.jmi.MatlabLooper.postMatlabMessage(MatlabLooper.java:150)
at com.mathworks.jmi.MatlabMCR.postAsync(MatlabMCR.java:1542)
at com.mathworks.jmi.MatlabMCR.eval(MatlabMCR.java:518)
at com.mathworks.jmi.Matlab.eval(Matlab.java:1197)
at com.mathworks.jmi.MatlabPath$PathCallback.completed(MatlabPath.java:1449)
at com.mathworks.jmi.MatlabMCR$InterestHandler.messageReceived(MatlabMCR.java:1663)
at com.mathworks.jmi.NativeMatlab.ProcessPendingEvents(Native Method)
at com.mathworks.jmi.NativeMatlab.processPendingEvents(NativeMatlab.java:508)
at com.mathworks.jmi.AWTUtilities$MatlabLatch.safeWait(AWTUtilities.java:892)
at com.mathworks.jmi.AWTUtilities$MatlabLatch.waitFcn(AWTUtilities.java:907)
at com.mathworks.jmi.AWTUtilities$Latch.acquire(AWTUtilities.java:770)
at com.mathworks.jmi.AWTUtilities$Invoker.invoke(AWTUtilities.java:500)
at com.mathworks.jmi.AWTUtilities.invokeAndWaitInternal(AWTUtilities.java:250)
at com.mathworks.jmi.AWTUtilities.invokeAndWait(AWTUtilities.java:111)
Error in matlab.ui.internal.dialog.FolderChooser/show (line 48)
Error in uigetdir_helper (line 32)
Error in uigetdir (line 61)
Error in Settings_Window>Select_Output_Report_Callback (line 275)
Error in gui_mainfcn (line 95)
Error in Settings_Window (line 42)

  0 Comments

Sign in to comment.

Accepted Answer

Nate Ellingson
Nate Ellingson on 23 Apr 2018
Called Mathworks, this is a known bug. They are not sure how they plan to fix it yet. It could be an update in within version 2018a, but we may have to wait for 2018b.

  1 Comment

Steven Lord
Steven Lord on 12 Sep 2018
Copying the answer given by Stefanie Schwarz into the Accepted Answer to give it additional visibility:
This is a known bug in MATLAB R2018a. Please refer to the below Bug Report for workaround instructions: https://www.mathworks.com/support/bugreports/1729458

Sign in to comment.

More Answers (8)

Stefanie Schwarz
Stefanie Schwarz on 6 Jun 2018
This is a known bug in MATLAB R2018a. Please refer to the below Bug Report for workaround instructions: https://www.mathworks.com/support/bugreports/1729458

  1 Comment

William Warriner
William Warriner on 20 Jul 2018
One thing I'd caution other users who might use the workaround is that the default behavior of the built-in uigetdir is to return 0 if cancel or X is pressed (i.e. for JFileChooser.CANCEL_OPTION in the workaround).

Sign in to comment.


Roberto Spreafico
Roberto Spreafico on 18 Apr 2018
I have the same problem with the uigetdir() function with the same Matlab version (R2018a)

  0 Comments

Sign in to comment.


Honghua Hu
Honghua Hu on 21 Apr 2018
The same symptom here, after I switch to 2018a...

  1 Comment

Nate Ellingson
Nate Ellingson on 23 Apr 2018
Called Mathworks, this is a known bug. They are not sure how they plan to fix it yet. It could be an update in within version 2018a, but we may have to wait for 2018b

Sign in to comment.


Marco Witte
Marco Witte on 8 May 2018
After switching to 2018a I got the same problem. This is very annoying, especially if I think about the amount we pay each year for the maintainace Service to mathworks...

  8 Comments

Show 5 older comments
Nate Ellingson
Nate Ellingson on 29 May 2018
Realized I could attach a file, place this file in your matlab path and use uigetdir like you normally would. and when a fixed version of matlab comes out simply remove this file from you matlab path.
Peter Bottelier
Peter Bottelier on 6 Jun 2018
Thanks Nate. Very helpful. I too experienced the same R2018a behaviour w.r.t. built-in uigetdir.m. It's rather annoying MathWorks did not detect this during release validation testing (apparently). @MathWorks, please improve testing your basic function tests!
William Warriner
William Warriner on 20 Jul 2018
Thanks Nate, helped me a bunch! One thing I'd caution other users who might download the attachment is that the default behavior of the built-in uigetdir is to return 0 if cancel or X is pressed (i.e. for JFileChooser.CANCEL_OPTION in the workaround).
I am also posting this as feedback to the bug report given below.

Sign in to comment.


Rohan R
Rohan R on 7 Jun 2018
I see there are 3 uigetdir.m files. All the three need to be modified/replaced?
/usr/local/MATLAB/MATLAB_Runtime/v94/mcr/toolbox/matlab/connector2/shadowfiles/shadows/uigetdir/uigetdir.m /usr/local/MATLAB/MATLAB_Runtime/v94/mcr/toolbox/matlab/uitools/uigetdir.m /usr/local/MATLAB/MATLAB_Runtime/v94/mcr/toolbox/compiler/mdwas/mcr/uigetdir.m

  1 Comment

Nate Ellingson
Nate Ellingson on 8 Jun 2018
Don't replace any of those, just place uigerdir in a place in your path higher than all of those. A good place, if your using windows, would be in your "Documents\MATLAB" folder. There probably is an equivalent in linux, but I'm not sure. This is automatically added to your path above these other instances of uigetdir.m.
If you are only working on one application, you can place my uigetdir.m in the same directory as the main file.
When Matlab get updated to fix this bug, simply remove the file that you added.
Do this before compiling the application.

Sign in to comment.


Victor Gonzalez
Victor Gonzalez on 13 Jul 2018
This bug is marked as fixed with update 4, but in my deployed application the problem persists, the workaround is again the only "solution"

  0 Comments

Sign in to comment.


D. Plotnick
D. Plotnick on 31 Jul 2018
I am also still seeing this issue with Update 4.

  2 Comments

Steven Lord
Steven Lord on 31 Jul 2018
Updating is one part of the fix. Recompiling the application and contacting Support for the R2018a Update 4 Runtime to be installed where the application will be run are the other two pieces. Can you confirm that you have completed all three parts and still experience the bug? If so I recommend contacting Support and working with them to determine why the fix has not resolved the issue.

Sign in to comment.


Geoffrey Vincent
Geoffrey Vincent on 12 Sep 2018
Edited: Geoffrey Vincent on 12 Sep 2018
Error for me also :
Error using matlab.ui.internal.dialog.FolderChooser/doShowDialog (line 70)
Java exception occurred:
java.lang.IllegalArgumentException: eval requires a valid MCR id when running in standalone mode.
at com.mathworks.jmi.NativeMatlab.PostMatlabMessage(Native Method)
at com.mathworks.jmi.NativeMatlab.postMatlabMessage(NativeMatlab.java:224)
at com.mathworks.jmi.NativeMatlab.postMatlabMessage(NativeMatlab.java:240)
at com.mathworks.jmi.MatlabLooper.postMatlabMessage(MatlabLooper.java:150)
at com.mathworks.jmi.MatlabMCR.postAsync(MatlabMCR.java:1542)
at com.mathworks.jmi.MatlabMCR.eval(MatlabMCR.java:518)
at com.mathworks.jmi.Matlab.eval(Matlab.java:1197)
at com.mathworks.jmi.MatlabPath$PathCallback.completed(MatlabPath.java:1449)
at com.mathworks.jmi.MatlabMCR$InterestHandler.messageReceived(MatlabMCR.java:1663)
at com.mathworks.jmi.NativeMatlab.ProcessPendingEvents(Native Method)
at com.mathworks.jmi.NativeMatlab.processPendingEvents(NativeMatlab.java:508)
at com.mathworks.jmi.AWTUtilities$MatlabLatch.safeWait(AWTUtilities.java:892)
at com.mathworks.jmi.AWTUtilities$MatlabLatch.waitFcn(AWTUtilities.java:907)
at com.mathworks.jmi.AWTUtilities$Latch.acquire(AWTUtilities.java:770)
at com.mathworks.jmi.AWTUtilities$Invoker.invoke(AWTUtilities.java:500)
at com.mathworks.jmi.AWTUtilities.invokeAndWaitInternal(AWTUtilities.java:250)
at com.mathworks.jmi.AWTUtilities.invokeAndWait(AWTUtilities.java:111)
Error in matlab.ui.internal.dialog.FolderChooser/show (line 48)
Error in uigetdir_helper (line 32)

  1 Comment

Miguel Alfonso Mendez
Miguel Alfonso Mendez on 28 Nov 2018
I have the same problem:
Error using matlab.ui.internal.dialog.FolderChooser/doShowDialog (line 70)
Java exception occurred:
java.lang.IllegalArgumentException: eval requires a valid MCR id when running in standalone mode.
at com.mathworks.jmi.NativeMatlab.PostMatlabMessage(Native Method)
at com.mathworks.jmi.NativeMatlab.postMatlabMessage(NativeMatlab.java:224)
at com.mathworks.jmi.NativeMatlab.postMatlabMessage(NativeMatlab.java:240)
at com.mathworks.jmi.MatlabLooper.postMatlabMessage(MatlabLooper.java:150)
at com.mathworks.jmi.MatlabMCR.postAsync(MatlabMCR.java:1542)
at com.mathworks.jmi.MatlabMCR.eval(MatlabMCR.java:518)
at com.mathworks.jmi.Matlab.eval(Matlab.java:1197)
at com.mathworks.jmi.MatlabPath$PathCallback.completed(MatlabPath.java:1449)
at com.mathworks.jmi.MatlabMCR$InterestHandler.messageReceived(MatlabMCR.java:1663)
at com.mathworks.jmi.NativeMatlab.ProcessPendingEvents(Native Method)
at com.mathworks.jmi.NativeMatlab.processPendingEvents(NativeMatlab.java:508)
at com.mathworks.jmi.AWTUtilities$MatlabLatch.safeWait(AWTUtilities.java:892)
at com.mathworks.jmi.AWTUtilities$MatlabLatch.waitFcn(AWTUtilities.java:907)
at com.mathworks.jmi.AWTUtilities$Latch.acquire(AWTUtilities.java:770)
at com.mathworks.jmi.AWTUtilities$Invoker.invoke(AWTUtilities.java:500)
at com.mathworks.jmi.AWTUtilities.invokeAndWaitInternal(AWTUtilities.java:250)
at com.mathworks.jmi.AWTUtilities.invokeAndWait(AWTUtilities.java:111)
Error in matlab.ui.internal.dialog.FolderChooser/show (line 48)
Error in uigetdir_helper (line 32)

Sign in to comment.

Sign in to answer this question.

Tags