Hi,
The error message is generally due to the BW Safety Belt feature which is activated on you SAP BW system.
In fact, It's is a size restriction for result sets which protects against large
results quantities that may reduce the system performance and could cause high memory
consumption.
For more details please refer to the SAP KBA : 1750332 - Error 'Result set too large (xx cells); data
retrieval restricted by configuration (maximum = yy cells) (WIS 00000) in
WebIntelligence BI 4 SP04 reports from BICS connection.
Hope this helps,
Amine.