Indesign files open (or become) write protected

[Jürgen27241002fjjp]

When opening Indesign files on a (smb) file share the files become or open write protected. The idlk file is generated in the directory and then disappears (closed).
The only way to save the files is „save as...“ with a different file name. That's not acceptable if you work as a on large projects.

We exprience the same behaviour on all Macs accessing files on a Windows share using smb for a long time. Files open write protected. There were several updates on Indesign and MacOS but the problem is still there.
We checked all permissions etc. on the file server, user permissions etc. Everything is fine. Changed from afp to smb - no difference. Tried smb-share on different OS. All the same.
I checked and tried everything I found on this problem but nothing solved the problem...

Is there a solution in the meantime?

[Robert at ID-Tasker]

Your connection to the server is too slow - latency / lag is too high. 

InDesign is extremely sensitive to this and that's why it opens the file but as read-only. 

[Jürgen27241002fjjp]

Many thanks for the tip. I recorded the response times via ping for a long time today. The response times are 0.4 ms on average without major deviations. The clients are connected with 1Gbit, the server (SSD storage) with 4 x 10Gbit.
The throughput is generally not slow (read/write up to 100 MB/s).
How can I find out if latency is the reason for the problem?

[Robert at ID-Tasker]

Can you somehow "shorten the distance" to the server? Connect more directly? 

You can have as many gigabits as you want - it's the "response time" that matters.

I don't know if 4ms is too slow for InDesign - but try to open the same INDD file saved to your local drive. 

[Robert at ID-Tasker]

@Jürgen27241002fjjp

Someone just posted: 

https://community.adobe.com/t5/indesign-discussions/indesign-for-windows-opening-files-as-read-only-...

Might be an answer to your problem? 

[Jürgen27241002fjjp]

Hi, we did some testing on the network and server infrastructure. Everything ok. We tested the following:

The problem still exists. It can be reproduced with the following scenario and can probably be broken down to an Indesign problem: If you connect two Macs via network (in which they are the only participants) and configure one as a server (file sharing of a folder) and the other as a client with Indesign CC 2024, files in the shared folder open sporadically and “normally” or “read-only”. In case of repetitions, one and the same file is opened normally in some attempts and as read-only in other attempts. The behavior has been verified on several clients.
This minimal installation rules out the server, network and infrastructure problems mentioned so far from my point of view if this does not even work.
Other servers (Windows Server, Linux both via afp and smb) show the same behavior.
How can I contact support with this problem? Is there a possibility?
Any idea?

[Robert at ID-Tasker]

Unfortunately, it doesn't rule out server / network / infrastructure. 

What kind of a router / switch do you use to connect both Macs? 

What is the connection speed? 

Is there anyone else connected to the same switch / router? 

[Jürgen27241002fjjp]

The one Mac is a MacPro (Server) the Clients in the test scenario are iMacs connected via HPE Switch 1950 with 1Gbit. In other test we connected a macPro via 10Gbit to a 10Gbit HPE Core-Switch to the Server infrastructure (4x10Gbit, HPE Server/Storage). Same results.

[Jürgen27241002fjjp]

Ps: There are only these two macs connected to the switch, nothing else. Clean and simple scenario.

[Robert at ID-Tasker]

Can you do a small test? 

Please create a simple INDD document - one Rectangle - nothing else.

Save it to your server - and open it 10x or 20x times. 

Then please find biggest INDD file you have - and do the same test - open it 10x or 20x times. 

[Jürgen27241002fjjp]

Yes, sure.
I just created a simple file with only on rectangle filled with color, saved it to the server and reopened it for 10x. 6x read-only, 4x normal. Similar on larger files (200 MB) 4 read-only, 6 normal. Could be different next time...

[Robert at ID-Tasker]

That's strange... 

[Jürgen27241002fjjp]

YES!!!
And not practicable and acceptable in a graphic arts/design team environment!!!

[Robert at ID-Tasker]

Unfortunately. 

But it can still be a problem with your network...

Because, if you can open your INDD files locally - without any problems... then there is something, that InDesign doesn't like...