[Michael Song]

I think I might find out the issue.
The Position property expects an array(if you don’t split it). So the IF condition in expression has to have an array return value if the condition isn’t fulfilled.

if ( time.toFixed(3) == thisComp.marker.nearestKey(time).time.toFixed(3) ) {
value+=[0,40];}else{value;}

Also you don’t need time.value to work. time.toFixed(3) works just by itself.

[Michael Song]

if ( time.value.toFixed(3) == thisComp.marker.nearestKey(time).time.toFixed(3) ) {
value+=[0,40];}
AE still shows as error. Any idea?

[Michael Song]

Thanks. So I guess what’s wrong with my original expression is that it compares two values that are not of the same type. So they can not be compared until they are turned into the same type. Is this correct?

[Michael Song]

exactly at that time