Column store error: [34011] while closing cursor in stored procedure

I have procedure below that partitions tables with using RANGE partitions. The tables already have data in them. IF i comment out the CLOSE cursor statement it works fine.

I am getting the following error

Could not execute 'CREATE PROCEDURE sp_PartitionTable ( in p_TableName varchar ) LANGUAGE SQLSCRIPT AS query_str ...' in 36 ms 59 µs .

SAP DBTech JDBC: [2048]: column store error: [34011] failed to save calculation scenario : The following errors occured: Inconsistent calculation model (34011)

Details (Errors):

- CalculationNode ($$_SYS_SS2_RESULT$$): Internal compiler error at OPTESSA_MLS.SP_PARTITIONTABLE: line 17 col 1 (at pos 323).

CREATE PROCEDURE sp_PartitionTable

(

          in p_TableName varchar

)

LANGUAGE SQLSCRIPT AS

query_str varchar(4000);

CURSOR c_cursor1 FOR SELECT scen_id FROM scenario ORDER BY scen_id;

BEGIN

query_str:= '';

FOR cur_row as c_cursor1 DO

          query_str := :query_str || 'PARTITION VALUE = ' || cur_row.scen_id ||',';

END FOR;

CLOSE c_cursor1;

query_str := :query_str || 'PARTITION OTHERS)';

EXEC 'alter table ' || :p_TableName || ' PARTITION BY RANGE(scen_id)(' || :query_str;

END;