CEP Plugin : IOError when loading PlugPlugExternalObject in 20.4

[a.cavoleau]

Hello,

We have an InDesign plugin on the marketplace and all our MacOS users who updated to Indesign 20.4 has an error at plugin launch "IOError: I/O error".
The error comes from this line that has been in the plugin for 8 years without any issue:

xLib = new ExternalObject("lib:\PlugPlugExternalObject");

From what I found, this is still the standard way to load this library.

I've tried to remove the \ but it did not change anything, at least when building locally.

Does anyone else have the same issue since the update ?
Is it a known issue ?

[Charu Rajput · Accepted solution]

Hi @a.cavoleau 

This is a known bug in the latest version of InDesign and has already been reported. Unfortunately, it has reappeared in the most recent release.

[Manan Joshi · Accepted solution]

Hi @a.cavoleau,

Seems this is getting reported by others as well. See https://community.adobe.com/t5/indesign-discussions/csxs-event-warning/m-p/15372744#M628319

-Manan

[Abhishek Rao · Accepted solution]

Hi everyone,

Just wanted to share an update that the issue with PlugPlugExternalObject and the resulting I/O error has been addressed in the InDesign 20.4.1 update. If you haven't updated yet, we recommend giving this version a try.

Please let us know if the problem persists after updating, we'll be happy to assist further!

Abhishek