When High Level Assembler is installed, each assembler option is preset to a default. The IBM-supplied default options are shown above the main path of the syntax diagrams in the description of the assembler options that follow. However, these might not be the default options in effect at your installation; the defaults could have been changed when High Level Assembler was installed. For example, NOADATA is an IBM-supplied default, and ADATA might be the default at your installation. During an assembly you cannot override default options that were fixed during installation (see Fixed installation default options). The assembler issues a message if you try to override a fixed option.

PESTOP: If the PESTOP option was specified during installation, and an error is detected in the options you specify at run time, the assembly stops.