try easy cut studio from https://www.easycutstudio.com/
I've used it to cut a variety of vinyl decals using my own Roland GX-300 cutter and other artwork. It it completely compatible with my Roland GX-300 machine and very easy to use.
Question edited for FULL 'make model (what it is)'.
Question moved from Computers to correct category.
"DATA ERROR CANCELING..."
Output was stopped because a problem was found in the data received.
Operation cannot be continued. Check whether or not there is an error in the data. Check for a problem with the connector cable or the computer, and redo the operation from setting up the object to be printed on.Roland Technical Support.
ERROR 2:
Appears if the number of parameters differs from the permissible number.
You can download the EasyCut Pro software from https://www.easycutpro.com/ and give it a try.
This vinyl cutting software works great with Roland GX-300 CAMM-1 Pro Vinyl Cutter.
the 0101 error in sp540 is the Limit Position Initialize has not been done. you find videos on you tube that can help you to do the limit position operation. (you have to enter in Service Mode Menu) its easy to do it yourself. i hope this help.
Could you try
(1) Temporarily stick a white strip over the sensor where it detects the media or
(2) On the length of the media or
(3) Even staple same sized white media below the black one which you can un-staple after printing.
kindly ignore if these are (s) tupid answers