Problem:

Assembler messages:

Error: Can't open Z for reading.

Z: No such file or directory

Z:0: Error: Can't open DA1.1 for reading.

Z:0: DA1.1: No error

cob32: error(s) in assembling /var/tmp/cobAAAa29655/ldtab.s

Resolution:

Check to see if you have the Operating System's ANSI C compiler and GCC compiler installed.

The GCC compiler also installs its own assembler and will reference some of its own header files for C instead of using the Operating System's.   So ensure that it uses the right assembler, the Operating System's assembler, either by un-installing the gcc components or ensure that the gcc components are at the end of PATH searches and that it looks for the Operating System's ANSI C compiler first.