Hi,
Can you please refer the following SAP KBA Note with regard to this and check whether it helps you:
2151942 - Unable to open BEx Analyzer and execute SAP .XLA files
And, can you please apply latest Patch Level of SAP GUI for Windows 7.40 and latest Patch Level
for BI 7.0 ADDON FOR SAP GUI 7.40 and check whether it helps you.
Also, please refer the following SAP Note:
147519 - Maintenance strategy / deadlines for SAP GUI
Thanks & Regards,
Sapna