Cura 4.8.0 & 4.9.0

[langley51 0]

Morning Ultimaker developers ,

I was using Cura Slicer 4.8.0 and I downloaded the new Cura Slicer 4.9.0 and started having problems printing . I tried several different setting as  I thought I had made some changes by mistake. After 5 or 6 attempts I started to reach out to Youtube video sites & Ultimaker (I sent you a email) to see what was going on. I was trying to print items like the "Flexi Pterodectyl & Dragon". The flexi parts seem they were bonded together with other parts and was not able to flex, could not understand  what was going on as I had printed flexi butterflys no problem before. Then I remembered I had downloaded the Cura 4.9.0, so as an experiment I reinstalled a version of Cura 4.8.0 , sliced the same file and guess what, the flexi is printing fine now with Cura 4.8.0. 

So, it there a bug or some setting I need to turn off / on in Cura 4.9.0 that will eliminate this problem? 

I am using a Lotmaxx SC10 Shark and I have a new  Anycubic Chrion, I am kinda leary  now in using Cura 4.9.0 with my printers now. 

Below view the 4.9.0 Cura vs 4.8.0 Cura ( 4.8.0 works fine.. 4.9.0 not printing good, used same file to print in both versions of Cura)

Looking for a reply...

Thanks, AL

[mrender 25]

I had problems on Cura 4.9 with material retract on extruder 2.  It seemed that the material was retracting on extruder change but was not going back ready to print.  Going back to Cura 4.8 rectified the problem.

[gr5 2,172]

This is a known 4.9 bug (2nd extruder over retraction).  Expect a 4.9.1 release soon.

[Geschichtsrentner 1]

I am using Cura 4.9.1 with my Sovol SV01 printer. I found out that my retraction is getting longer and longer over a print. Instead of 3mm i get retractions of up to 10mm and more, increasing over the length of the print. As a result my printer starts clogging. Is that a known bug?

[GregValiant 1,251]

I haven't heard of that one.  Post a gcode file here that has the problem.  Somebody will take a look.