../../../../casl2 -slatd ../../../../as/ERR/ds_err.casl

Assemble ../../../../as/ERR/ds_err.casl (0)
../../../../as/ERR/ds_err.casl:1:MAIN    START
../../../../as/ERR/ds_err.casl:2:        LAD     GR0,=10
../../../../as/ERR/ds_err.casl:3:        ST      GR0,A
../../../../as/ERR/ds_err.casl:4:A       DS
Assemble error - 106: operand count mismatch
 ../../../../as/ERR/ds_err.casl:4: A       DS