ZModem - Up/Download broken - ssh - 2025.2.26.0

Hello,

We have opened an internal ticket to investigate this issue.

Regards,

Hello,

I can confirm that in the newest version of RDM, ZModem is broken.

I can't remember precisely what was the last functional version, but my colleague 2024.3.25.0 64-bit is still working.
(I would say that at least, all version from 2025.2.13.1 are broken)

Have a nice day,
Clement.

Hello Clement,

Thanks for the additional feedback. It would make sense that it stopped working with 2025.2 as with that version we made a major change to our terminal library. The codebase was converted from C to C#, with a goal of being more maintainable and for some features to be more easy to implement in the future. While we tried to translate every function exactly, unfortunately some things slipped by us and that would explain why ZModem might not be working.

We'll try to get this back in working order as soon as we can.

Regards,

Hello,

We have a potential fix internally and it should be available starting from the next release of RDM (2025.2.28.0).

Best Regards,

Hello Clement,

Thanks for the additional feedback. It would make sense that it stopped working with 2025.2 as with that version we made a major change to our terminal library. The codebase was converted from C to C#, with a goal of being more maintainable and for some features to be more easy to implement in the future. While we tried to translate every function exactly, unfortunately some things slipped by us and that would explain why ZModem might not be working.

We'll try to get this back in working order as soon as we can.

Regards,

Thank you for the explanation!

Hello,

We have a potential fix internally and it should be available starting from the next release of RDM (2025.2.28.0).

Best Regards,

Hello,

After updating to 2025.2.28.0, ZModem still doesn't work.
Downloading will output this:

**

sz: skipped: yes.txt
                    **

Upload file:

rz waiting to receive.**

But not files is moving at all.

Have a nice day,
Clement.

Hello Clement,

Thank you for this information. I have forwarded it to our SSH expert and he should be able to take another look as soon as he comes back from his vacations.

Best Regards,

Hello Clement,

Our SSH expert has come back from vacation and would like to know what you receive in your logs if you put the "Verbose" value to "2". This could help him figure out what is happening on your end.

This should add some additional logs in your terminal which you could copy paste to us.

See image below:


Best Regards,

Hello,

Here are the logs that came:

SZ

**<-H ZRQINIT(0, 0, 0, 0)


Server is requesting to send a file through ZMODEM


->H ZRINIT(0, 0, 0, 0) aa51



<-H ZRQINIT(0, 0, 0, 0)


Server is requesting to send a file through ZMODEM


->H ZRINIT(0, 0, 0, 0) aa51

RZ

->H ZFIN(0, 0, 0, 0) 022d


<-H ZRINIT(0, 0, 0, 35)


Server is requesting to receive a file through ZMODEM


->H ZFIN(0, 0, 0, 0) 022d


<-H ZRINIT(0, 0, 0, 35)


Server is requesting to receive a file through ZMODEM


->H ZFIN(0, 0, 0, 0) 022d


<-H ZRINIT(0, 0, 0, 35)


Server is requesting to receive a file through ZMODEM


->H ZFIN(0, 0, 0, 0) 022d


<-H ZRINIT(0, 0, 0, 35)

For both SZ and RZ, the log output is infinite.
But the log output pace of SZ is very slow, whereas RZ is really fast.

RDM version: 2025.2.29.0 64-bit (JIT)

Have a nice day,
Clement.

Hello Clement,

Thanks for the logs. They have been added to our internal ticket and our assigned developer has been informed.

We will keep you updated on any progress.

Best Regards,

Hello,

A new potential fix will be available starting from our next release of RDM (2025.3.17.0).

Best Regards,

Hello,

The problem has been fixed.
Thank a lot!.

Have a nice day,
Clement.