A strange issue is occurring on a colleague's work station.

CTB file path has been verified in ACAD preferences. Calling "stylesmanager" shows the CTB file exists in the local directory shown in preferences. However...

Lineweight hierarchy does not appear when plotting. Previewing, plotting to PDF and plotter output all show someting like a monochrome style. Opening the file on my workstation, where I have not experienced this issue, yields the same result when plotting. Toggling "Show/Hide Lineweights" also does not show the hierarchy I would expect to see.  

Additionally:

CTB is recognized in Layout Page Setup.

Layer manager colors are identical in model space and active viewports.

All layer manager lineweights set to default in model space and active viewports.

File has been purged and audit shows no errors.

When first notified of this issue, I saw the CTB was missing and then copied this into the local Plotstyles folder. Is there another step to "refresh" the file's cache or something? What else am I missing here? Anybody else experiencing this issue?

Many thanks,

M