Solidworks being case sensitive when opening an as

Hi,

Wondering if anyone else is seeing this option box when opening an assembly?

Would you like to open the Replaced file yourself?

Open file from original location

Open file from current location

Open all replaced files from original location

Choosing either of the top two options, loads the file "\\TESTSERVER\testfolder\testpart.sldprt" with the server name in UPPER case.

It's the same part!

Saving the assembly gives the same option box once again after saved/closed and reopened.

Looking at file references also shows the above for each file too.

This is now happening to every assembly that I open that has library parts/toobox parts on a server.

This has only just started to happen.

It happens on two different computers.

PC1

Windows 7 64 bit

Solidworks premium 2017 sp5

PC2

Windows 7

Solidworks 2017 professional sp5

Hardware identical

Windows server 2008 R2 Standard

This server is only for Solidworks toolbox, library and Workgroup PDM .nothing else is running on it.

Thanks