!--a11y-->
-1002: Too many columns 
Explanation:
The number of columns of a table that contains no (at least one) user-defined key column is limited to 254 (255).
A named index can be created across a maximum of 16 columns of a table.
In a REFERENTIAL CONSTRAINT definition more REFERENCING than REFERENCED COLUMNS were specified. The number of the specified columns in the referencing table must correspond to the number of the referenced columns of the REFERENCED TABLE specified implicitly or explicitly.
User Action:
Use a QUERY-statement issued on the system table DOMAIN.COLUMNS to find out the current definition of the table. You must not define any further columns.
Correct the number of columns in the index definition.
Use a QUERY-statement issued on the system table DOMAIN.COLUMNS to find out the complete definition and the key columns of the REFERENCED TABLE.
