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