Thanks.
I looked at the failure point indicated by the message, but cannot see any reason for the failure.
If the workbook is being coauthored then there might be a problem – its difficult to test all eventualities with CoAuth.
But I have not tested FXL V4 using a shared workbook through a VPN tunnel.
I don’t think a full license would make any difference to the problem.
Sorry not to be more help.