Dear SPM Users, I get the following error during the Averaging step in EEG processing. The error seems to be dependent on which type of averaging I use (with some files it works with the standard, but not with robust setting, but there are files where neither of them works). Here is the error log: SPM12: spm_eeg_average (v5624) 16:52:59 - 18/01/2015 ======================================================================== Failed 'Averaging' Error using mat2file Can't open file for writing: E:\Studies\VE_EEG_Decode_ForcedFusion\EEG_analysis\s01\maefdfMspmeeg_s01_2.dat Check for write permission or whether the directory exists. In file "E:\MATLAB\spm12\@file_array\subsasgn.m" (v6157), function "subfun" at line 158. In file "E:\MATLAB\spm12\@file_array\subsasgn.m" (v6157), function "subsasgn" at line 85. In file "E:\MATLAB\spm12\@meeg\subsasgn.m" (v5025), function "subsasgn" at line 30. In file "E:\MATLAB\spm12\spm_eeg_average.m" (v5624), function "spm_eeg_average" at line 194. In file "E:\MATLAB\spm12\config\spm_cfg_eeg_average.m" (v5624), function "eeg_average" at line 106. System details: ---------------------------------------------------------------------------------------------------- MATLAB Version: 8.3.0.532 (R2014a) MATLAB License Number: Operating System: Microsoft Windows 7 Enterprise Version 6.1 (Build 7601: Service Pack 1) Java Version: Java 1.7.0_11-b21 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode ---------------------------------------------------------------------------------------------------- I have already checked the folder permissions, the problem is somewhere else. Could anybody help me please? Many thanks and best, Mate Aller