[XeTeX] How to reduce terminal output from xelatex?

[David Carlisle]

>   xelatex "\def\istwocol{1} \input{./tmpmyfile.tex}  -max-print-line=2048 -c-style-errors -interaction=batchmode"

You are applying the options too late so they are ignored.

  xelatex  -max-print-line=2048 -c-style-errors -interaction=batchmode
"\def\istwocol{1} \input{./tmpmyfile.tex}"

David