If/Then statement error: Invalid token else

[amorrissen]

I'm wracking my brain trying to fix this basic if/then expression. I have a text layer(name "Position (l/r") whose value I want to control the opacity of other layers. I'm using this expression on the layers whose opacity I want to control and applying it to the Opacity property:

if(thisComp.layer("Position (l/r)").text.sourceText=="r")100 else 0;

AE gives me the following error: 

SyntaxError:Unexpected token else

I've used the exact same if/then expression format in other projects (only changing the layer name) and it works fine. I've copied this expression into another project and it works fine. If I copy the expression from a working project into the current project, it doesn't work.

I'm using AE 16.1.1.1 on Windows 10.

[OussK · Accepted solution]

this because the new javaScript engine in AE CC 2019,,

you have 2 option to fix this, you can run the legacy ExtenScript from project settings

Or put the if/else value inside curly bracket like this { 100 }else{ 50 }

[amorrissen]

Thank you!

I assume new projects are set to Javascript by default, because my old projects show "Legacy ExtendScript".

[Roei Tzoref]

option 3 is to use the new “update legacy expressions” script under file->scripts

[W1k!d]

Thank you, this helped me

[GibbzeeEdits]

Hi! Would you happen to know how I could save this new preset/script? I'm using a plugin/tool from 2014 that broke with the new JavaScript update, and the original creator is no longer updating it. "Updating Legacy Expressions" seems to have done the trick, but I need to save this so I don't need to do it each time I open a project. Thanks!

[laizd4021037]

Thank you soooo much!

[toddd71512161]

Thanks Roei, the "update legacy expressions" worked!

[antonbolbat]

Thak you, a lot!
Solution worked:

Or put the if/else value inside curly bracket like this { 100 }else{ 50 }

[OneTrex]

This thread helped solve the issue. Thank you fine people.. much appreciate:exclamation_mark:😃

[Abdul32466124zyup]

currently i have this problem woth my after effect 2023, anyone help me resolve this