Error after upgrading to 4.20 - LOG: Encountered "\u001c" at line 1, column 70...

[pmcnallyma]

Hello,
I ran the update this morning on two Mirth environments and one is throwing an error saying this:
[2022-12-12 09:01:54.315] ERROR (org.apache.velocity.parser:196): LOG: Encountered "\u001c" at line 1, column 70.
Was expecting one of:
"[" ...
"|" ...
"}" ...
"}" ...

I can't figure out what to fix. Googling says this may be related to APIs but we aren't using Mirth for those at this time.
I tried viewing each channel to match up the times of the errors but I am unable to locate where this may be coming from.
Any advise or help would be appreciated.
Thanks,
P

[pacmano1]

That is a unicode character being seen in a string. Likely been there all the time. I suspect you need to find it and remove it.

[pmcnallyma]

Thanks. I think this means the issue is in a transformer/filter and not the messages. I wrote all of these channels but am not sure what JSON is.

[pacmano1]

Oh - might not be JSON actually, could just be the unicode character.

[pmcnallyma]

To close the loop, this was user (me) error. I must have deleted the last } in the Subject line on our alert message.