When you execute a query, the termination CX_SY_CONVERSION_NO_NUMBER occurs. Other terms
Query, exception, variable, negative figure Reason and Prerequisites
Program error in the function group RRS2 Solution
The error occurs if the query contains an exception in which the limits are set by variables. If a negative value is entered for the variable, the above termination occurs.
https://service.sap.com/sap/support/notes/519530 (SAP Service marketplace login required)
Key words :    , support package,