My apologies in advance for a not-ideal bug report. Everything below is on Windows, but I don’t have the ability to run the linux version, so I can’t tell you whether it is Windows-specific.
In 5.6.0, I can open FVCOM output files (which are netCDF, using the “VisItNetCDFFVCOM_MTSDReader” reader). There’s the known problem in 5.6.0 in Windows that it won’t read files of >2Gb, but otherwise it works, and some beautiful plots are possible.
In recent nightly builds (I’ve tested 1554 and 1598), the large file problem is fixed, but reading FVCOM files seems to be broken. I can open them happily, and see the available fields populated in the Properties pane, but no matter what I select and Apply I never see anything rendered, and the toolbars that control color maps, rendering type, etc., stay greyed out. There’s nothing relevant in the Output Messages.
Rendering is not broken for all data - the example files that ship with Paraview still display - but I can’t get anything from FVCOM to show.
Here’s a relatively small (47Mb) example file that works on 5.6.0 but not in recent nightlies:
Beyond this, please let me know if I can usefully provide any other info, or if you’d like me to file a bug report on gitlab.