MPI race condition in LoadBalance when using HDF5 I/O across multiple nodes

[lmdelz]

Version: PICLas 4.0.0 (commit 790daf8)
Config: gatheredWrite=T, UseCollectiveIO=T, DoLoadBalance=T
Error: File not found when non-master ranks try to read LoadBalance info
Root cause: Missing MPI_Barrier after WriteStateToHDF5() in LoadBalance module
Workaround: Set DoLoadBalance=F or UseH5IOLoadBalance=F

[pnizenkov]

Thank you, we will have a look! Can you share a specific test case, where we could reproduce the issue?