Sorry Filmax but as explained in: https://easyeda.com/forum/topic/error_simulator-0zRL3lfxP your project is private so no-one but you can see it.

Looks like you have made it public now. If this is it: https://easyeda.com/filmax/timer-GnzLJVu4E then there are two mistakes in it (and one of them is ours: sorry about that!) 1) You have used a D type **latch** instead of a D type **flip-flop**. If you connect D to QN in a latch and then enable it, it will oscillate at a frequency determined by the propagation delay. To make a divide-by-2 (which I assume that is what you intended), you must use a flip-flop (DFFEE) and not a latch (DLATCHEE): https://en.wikipedia.org/wiki/Flip-flop_(electronics) 2) In the last update, the names of the JKFFEE, DFFEE, DLATCHEE, SRFFEE SRLATCHEE and TFFEE appear to have got corrupted as lost the `EE`suffix. * When you place the DFFEE part you need to edit the `name` property from `DFF` to `DFFEE`. If you fix those two things it should run OK. :)

Ok, thank you :)

thanks again for the solution to my problem. I noticed that the screen has changed and it no longer works the scroll of the mause to zoom. I can not zoom on the part of the pattern I'm working on. can you help me. thank you

`I noticed that the screen has changed and it no longer works the scroll of the mause to zoom. I can not zoom on the part of the pattern I'm working on.` There has been a major update overnight 15/16 October. https://easyeda.com/Doc/Tutorial/new-v-3.10.htm The loss of the zoom scroll seems to be a problem with Firefox: https://easyeda.com/forum/topic/Scroll_wheel_zoom_not_working-2FztL3lfx I expect this will be fixed soon but the workaround until then is to use Chrome (EasyEDA does generally work a little better with Chrome anyway)