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

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)

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9 Answers

Answer by Nate Ellingson on 23 Apr 2018
 Accepted Answer

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

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

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Answer by 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

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).

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Answer by Roberto Spreafico on 18 Apr 2018

I have the same problem with the uigetdir() function with the same Matlab version (R2018a)

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Answer by Honghua Hu on 21 Apr 2018

The same symptom here, after I switch to 2018a...

  1 Comment

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

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Answer by 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

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.
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!
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.

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Answer by 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

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.

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Answer by 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"

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Answer by D. Plotnick on 31 Jul 2018

I am also still seeing this issue with Update 4.

  2 Comments

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.
I meant to respond on this; the third stage is the key step that I did incorrectly. Thanks.

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Answer by Geoffrey Vincent on 12 Sep 2018
Edited by 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

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)

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