Hi Mark,
Please note that SAP GUI 7.20 is out of maintenance as of 9th of April 2013 as per
the following SAP Note:
147519 - Maintenance strategy / deadlines for SAP GUI
Please note that MS Excel 2013 is not supported on BEx Analyzer 3.x
Please refer the following SAP KBA Note:
1846536 - BEx Analyzer 3.x & 7.x : Support for MS Excel 2013 and Microsoft Windows 8
For SAP GUI 7.30, MS Excel 2013 and Microsoft Windows 2008 is supported as of
Frontend Patch 300 on BEx Analyser 7.x as per SAP KBA Note 1846536
So, when you are using BEx Analyser 7.x, you should have at least Frontend Patch 300 on
SAP GUI 7.30 for Microsoft Excel 2013 to be supported.
Can you please apply latest patch of SAP GUI for Windows 7.30 and
latest patch for BI 7.0 ADDON FOR SAP GUI 7.30 and check whether it helps you.
Thanks & Regards,
Sapna