If the error pops up during image tracing, try expanding the appearance of the vector first ( ) or flattening transparency before tracing.
For those using scripts, pressing the TAB key to hide all panels before running the script often prevents the error by reducing UI thumbnail generation. If the error pops up during image tracing,
the operation cannot complete because of an unknown error parm If the error pops up during image tracing,
Try saving the file as a PDF first , then re-saving it as an AI file. This can often "clean" corrupted document structures. Step-by-Step Solutions 1. Reset Illustrator Preferences If the error pops up during image tracing,
Corrupted preference files are the most frequent cause of the [parm] error.