[FieldTrip] fieldtrip plugin cannot find combineclusters.mexw64

Redepenning, Tim tim.redepenning at uni-bielefeld.de
Wed Mar 18 20:13:43 CET 2026


Dear list members,
Eeglab cannot find the combineclusters.mexw64 module.
Here's what I did:
In the STUDY tool of eeglab I created a study with two conditions.
I precomputed the channel measures (ITC).
For an individual channel I can use the cluster correction provided by the fieldtrip-lite plugin.
But if I average over frequency band and time to create topographies I get an error:
"EEGLAB error in function findcluster() at line 133:
Invalid MEX-file 'D:\eeglab2025.1.0\Fieldtrip-lite250523\private\combineClusters.mexw64'. The specified module could not be found." In fact, my matlab is in German, so the wording might be slightly different.
All other correction methods work.
In an earlier study this worked just fine. Since then the computer has been completely wiped and updated. Hence, Windows and some other software changes were made. The hardware has not been changed.

In the brainstorm forum (https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fneuroimage.usc.edu%2Fforums%2Ft%2Finvalid-mex-file%2F17648%2F2&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C7cbda8cea863402262b808de85227afb%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639094580313566441%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=eOE7zRUnd9xaSwxKLvHf4nLVfCzmcBPOFWk9jwygXnA%3D&reserved=0) someone said that this issue has been fixed through the mailing list with reference to an earlier message - unfortunately, the provided link is dead.

I tried recompiling the mex-files with ft_compile_mex. Here's the output:
"Skipping up-to-date MEX file compat/matlablt2010b/@uint64/abs
Skipping up-to-date MEX file compat/matlablt2010b/@uint64/min
Skipping up-to-date MEX file compat/matlablt2010b/@uint64/max
Skipping up-to-date MEX file compat/matlablt2010b/@uint64/plus
Skipping up-to-date MEX file compat/matlablt2010b/@uint64/minus
Skipping up-to-date MEX file compat/matlablt2010b/@uint64/times
Skipping up-to-date MEX file compat/matlablt2010b/@uint64/rdivide
Error: source file for deepcopy cannot be found.
Error: source file for increment cannot be found.
Error: source file for setzero cannot be found.
Error: source file for ft_omri_smooth_volume cannot be found.
Error: source file for sap2matlab cannot be found.
Error: source file for ft_getopt cannot be found.
Error: source file for read_16bit cannot be found.
Error: source file for read_24bit cannot be found.
Error: source file for lmoutr cannot be found.
Error: source file for ltrisect cannot be found.
Error: source file for plinproj cannot be found.
Error: source file for ptriproj cannot be found.
Error: source file for routlm cannot be found.
Error: source file for solid_angle cannot be found.
Error: source file for meg_leadfield1 cannot be found.
Error: source file for splint_gh cannot be found.
Error: source file for plgndr cannot be found.
Error: source file for ft_spike_sub_crossx cannot be found.
Error: source file for rename cannot be found.
Error: source file for getpid cannot be found.
Error: source file for nanmean cannot be found.
Error: source file for nanstd cannot be found.
Error: source file for nanvar cannot be found.
Error: source file for nansum cannot be found.
Error: source file for nanstd cannot be found.
Error: source file for det2x2 cannot be found.
Error: source file for inv2x2 cannot be found.
Error: source file for mtimes2x2 cannot be found.
Error: source file for sandwich2x2 cannot be found.
Error: source file for combineClusters cannot be found.
Skipping up-to-date MEX file external/fileexchange/CalcMD5
Error: source file for mxSerialize_cpp cannot be found.
Error: source file for mxDeserialize_cpp cannot be found."

Apparently, the compiling function cannot find the module either.
Any help would be greatly appreciated.

Best wishes,
Tim Redepenning


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