Expanded Variable-Length Rows

Adaptive Server version 15.7 redefines data-only locked (DOL) columns to use a row offset of up to 32767 bytes. You must configure Adaptive Server for a logical page size of 16K to create wide, variable-length DOL rows.

By default, Adaptive Server does not use wide, variable-length DOL rows. Enable wide, variable-length DOL rows for each database using:
sp_dboption database_name, 'allow wide dol rows', true

See "Data Storage" in the Performance and Tuning Series: Physical Database Tuning.