# Unable to read file - doesn't appear to be GCode **URL:** \ **Category:** Troubleshooting (X35/X50)\ **Created:** [November 8, 2022, 4:34pm UTC](https://forum.onefinitycnc.com/t/unable-to-read-file-doesnt-appear-to-be-gcode/16356 "2022-11-08T16:34:28Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![DaveM](https://avatars.discourse-cdn.com/v4/letter/d/67e7ee/32.png) [@DaveM](https://forum.onefinitycnc.com/u/DaveM)\ **Post date:** [November 8, 2022, 4:34pm UTC](https://forum.onefinitycnc.com/t/unable-to-read-file-doesnt-appear-to-be-gcode/16356/1 "2022-11-08T16:34:28Z")
After updating Vcarve Pro to version 11.503, I am seeing this error when loading Gcode files: {“message”:“Unable to read file - doesn’t appear to be GCode.”,“code”:400} Some Forum posts suggest the Post Processor is wrong. I don’t think that changed with the update. All these .crv files worked OK for me before updating Vcarve. Using Notepad++, the .ngc files look like good Gcode to me. Any suggestions on what to look at would be deeply appreciated. Thank you, Dave ---
**Author:** ![Tim](https://avatars.discourse-cdn.com/v4/letter/t/ce73a5/32.png) [@Tim](https://forum.onefinitycnc.com/u/Tim)\ **Post date:** [November 8, 2022, 7:04pm UTC](https://forum.onefinitycnc.com/t/unable-to-read-file-doesnt-appear-to-be-gcode/16356/2 "2022-11-08T19:04:41Z")
How about an answer Onefinity, having the same issue. Updated to 1.1.1 last week everything worked ok. This morning it wont read the G Code. FOR ANYTHING. Can you get this fixed please. Before you blame it on something else. NOTHING HAS CHANGED ON MY END or V Carves end. It worked on Friday Sat Sun Mon. But not today. ---
**Author:** ![Hermsen.BJ](https://avatars.discourse-cdn.com/v4/letter/h/779978/32.png) [@Hermsen.BJ](https://forum.onefinitycnc.com/u/Hermsen.BJ)\ **Post date:** [November 8, 2022, 7:09pm UTC](https://forum.onefinitycnc.com/t/unable-to-read-file-doesnt-appear-to-be-gcode/16356/3 "2022-11-08T19:09:24Z")
Email support vs ragging here. Frustrating yes but this is not support. That said… Post a file here and maybe someone can help with specifics… Both these posts don’t provide enough detail. I use vcarve… Have not updated to the 11.503 version yet… Use 1.1.1 firmware without issue using previous gcode and newly created gcode. ---
**Author:** ![DaveM](https://avatars.discourse-cdn.com/v4/letter/d/67e7ee/32.png) [@DaveM](https://forum.onefinitycnc.com/u/DaveM)\ **Post date:** [November 8, 2022, 8:10pm UTC](https://forum.onefinitycnc.com/t/unable-to-read-file-doesnt-appear-to-be-gcode/16356/6 "2022-11-08T20:10:48Z")
Here is a file that will not load: [Barn+Text\_2-All\_Text\_V\_Bit\_60.ngc](https://forum.onefinitycnc.com/uploads/short-url/ZR45UiFQudXE5RUONuziKgHY7n.ngc) (39.7 KB) ---
**Author:** ![OnefinityCNC](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/onefinitycnc/32/7_2.png) [@OnefinityCNC](https://forum.onefinitycnc.com/u/OnefinityCNC)\ **Post date:** [November 8, 2022, 8:58pm UTC](https://forum.onefinitycnc.com/t/unable-to-read-file-doesnt-appear-to-be-gcode/16356/7 "2022-11-08T20:58:52Z")
you have special characters in the file name, remove them (like + - and \_ ) ---
**Author:** ![DaveM](https://avatars.discourse-cdn.com/v4/letter/d/67e7ee/32.png) [@DaveM](https://forum.onefinitycnc.com/u/DaveM)\ **Post date:** [November 8, 2022, 9:09pm UTC](https://forum.onefinitycnc.com/t/unable-to-read-file-doesnt-appear-to-be-gcode/16356/8 "2022-11-08T21:09:23Z")
I renamed the file and it now loads. That appears to be the problem. Thank you. ---
**Author:** ![ConvenientWoodwork](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/convenientwoodwork/32/22558_2.png) [@ConvenientWoodwork](https://forum.onefinitycnc.com/u/ConvenientWoodwork)\ **Post date:** [November 9, 2022, 12:03am UTC](https://forum.onefinitycnc.com/t/unable-to-read-file-doesnt-appear-to-be-gcode/16356/9 "2022-11-09T00:03:35Z")
I’ve been using underscores in my filenames for two years! It’s going to be a headache to change my naming conventions ---
**Author:** ![Hermsen.BJ](https://avatars.discourse-cdn.com/v4/letter/h/779978/32.png) [@Hermsen.BJ](https://forum.onefinitycnc.com/u/Hermsen.BJ)\ **Post date:** [November 9, 2022, 12:55am UTC](https://forum.onefinitycnc.com/t/unable-to-read-file-doesnt-appear-to-be-gcode/16356/10 "2022-11-09T00:55:15Z")
I believe the +is the true culprit as \_ is a common pattern for me too