Adobe Distiller [ Error: invalidfileaccess; OffendingCommand: showpage ]%%

When using Adobe Distiller to distill PDF's from Postscript created in PReS Software sometime we get an error from Adobe Distiller.

%%[ Error: invalidfileaccess; OffendingCommand: showpage ]%%

%%[ Flushing: rest of job (to end-of-file) will be ignored ]%%

%%[ Warning: PostScript error. No PDF file produced. ] %%

If we try the same Postscript again later it will distill fine, likewise if we try it on a different machine.

The error is not consistent and will work sometimes not others.