Thank you for your quick response and for forwarding the problem so it can be solved.
.xls is indeed for the time being an option. However, I have a lot of variables which are presented in multiple tabs in Excel. Importing the file in SPSS can only be one as 1 tab by 1 tab. Not very handy, so I hope SPSS will work soon
About the .csv file: This export also fails... The system gives the same information as for the SPSS export.
Thank you in advance for solving the problem!