Thank you for the update. When using the .sav file, did you fist open SPSS and then open the .sav file, or did you just double-click directly on the .sav file to open it?

As part of any bug hunting, would you mind first opening SPSS and then importing either the .csv or .txt file format into SPSS using the .sps syntax file? Make sure to set the character length in the .sps syntax file. Let us know if you still have the same error as if you just tried to open a .sav file.