Button Undefined in Adobe Animate (repost)

[PipTheFourth]

I've been having a headache recently about how to solve this problem please help.

As you can see in the first photo given I've put an instance name of the button, " mula_btn " and the second picture shows my coding for the button to go and stop and a frame " main menu". Everything seems right but smh the error saying undefined "mula_btn" appear and I don't know why. 

[LinSims]

Let me move this to the Animate forum for you, which is the appropriate forum for your question.

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[kglad]

your code needs to be on the same timeline where your object instance is named and needs to occur in a frame where the object exists. ie, the parent of mula_btn timeline and hopefully there's a frame named "main menu" on that parent timeline.

if you're doing all that (and it looks like you are from the screenshots), delete the button from the stage, drag another copy from the library and place it on stage (same layer, frame, and position -  copy the name from your actions panel, paste the name into your properties panel in the instance name field.  retest.

[PipTheFourth]

I forgot to include my frame label but here it is

[kglad]

<moved from using the community >

<merged>

[Colin Holgate]

I tried your script in my FLA, and it worked. May need to see your FLA to figure out what is different.