FTP UPLOAD - The operation failed with an error. 426: 426 Data connection: No such file or directory

Hi there,
I am a pretty new to MAKE, but successfully created a few scenarios that fulfill my needs. That’s a great tool.

I have a scenario watching a mailbox and uploading attachments to my NAS through FTP thanks to the FTP UPLOAD module.
All was working fine until I updated my FTP UPLOAD to latest version.
It now encounters “The operation failed with an error. 426: 426 Data connection: No such file or directory.” error. File is created at the right path, with the right name but no payload is uploaded to my NAS. The issue does not occur systematically but always with attachments in mails from one specifically sender’s domain.

I created a test scenario watching the mailbox and successively upload the attachment once with the older FTP module and another time with the latest version of the FTP module.

Older always works fine.
Newer always runs into error with the concerned attachments.

Some ideas from MAKE support were:

  • delete / recreate FTP connection
  • look for special characters : added some regex processing but not sure to be enough
  • the error is a transient response of the NAS and nothing can be done within my scenario

Has someone encountered such a problem ?
Any idea of what could fail at MAKE scenario side ?
Any idea of what could fail at Synology NAS side ?

Kind regards
Jerome