# Preform shows "Error while printing" message when using custom material with Form 1 **URL:** \ **Category:** Form 1/1+\ **Created:** [August 7, 2018, 7:41am UTC](https://forum.formlabs.com/t/preform-shows-error-while-printing-message-when-using-custom-material-with-form-1/19931 "2018-08-07T07:41:02Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![xquared](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.formlabs.com/xquared/32/12921_2.png) [@xquared](https://forum.formlabs.com/u/xquared)\ **Post date:** [August 7, 2018, 7:41am UTC](https://forum.formlabs.com/t/preform-shows-error-while-printing-message-when-using-custom-material-with-form-1/19931/1 "2018-08-07T07:41:02Z")
Hi, the maker space I am a member of recently received a donation of a used Form 1 printer. I put FW 1.44 on it and have been attempting to run OpenFL version of Preform. I can get the printer to start printing with the build-in material, but when i try to use the example custom material, i run into issues. When i attempted to send the print to Form 1, the progress bar starts to run to about a third of the way and then this pops up: ![12%20AM](https://us1.discourse-cdn.com/flex025/uploads/formlabs/original/2X/3/3aa2ca29fab35d80631616a7325d64e9583c6af9.png) the printer also seems to go through a soft reset when this happens. I scoured the forum but did not seem to find anyone else with similar problems. I would be really grateful if anyone can offer some insight. by the way, i am running preform on OSX el capitan. the windows machine has driver issues and won’t even detect the printer (can’t use it for comparison) ---
**Author:** ![system](https://us1.discourse-cdn.com/flex025/uploads/formlabs/original/3X/5/b/5bc2bdf993ff27c2e0eecab5010b25626fbb327a.png) [@system](https://forum.formlabs.com/u/system)\ **Post date:** [August 14, 2018, 7:41am UTC](https://forum.formlabs.com/t/preform-shows-error-while-printing-message-when-using-custom-material-with-form-1/19931/2 "2018-08-14T07:41:07Z")
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