FDTD GPU solver Issues.

- September 5, 2023 at 5:54 pm
  
  Linbo Shao
  Subscriber
  
  We have got the following issues when testing the new GPU solver for FDTD.
  It seems FDTD is trying to use a folder that does not exist. "/home/lumerical" for hdf5
  The /home directory is a network location, and Lumerical cannot use "/home/lumerical" as temp folder. I don't know how to set / change the folder.
  
  The error message is below:
  /opt/lumerical/v232/bin/fdtd-engine-mpich2nem" -gpu -t 1 "/XXXXX/XXXX/XXXX/XXXX.fsp"
  HDF5-DIAG: Error detected in HDF5 (1.8.17) thread 0:
  #000: /home/lumerical/temp_hdf/CMake-hdf5-1.8.17/hdf5-1.8.17/src/H5Pdcpl.c line 870 in H5Pset_chunk(): all chunk dimensions must be positive
  major: Invalid arguments to routine
  minor: Out of range
  HDF5-DIAG: Error detected in HDF5 (1.8.17) thread 0:
  #000: /home/lumerical/temp_hdf/CMake-hdf5-1.8.17/hdf5-1.8.17/src/H5D.c line 194 in H5Dcreate2(): unable to create dataset
  major: Dataset
  minor: Unable to initialize object
  #001: /home/lumerical/temp_hdf/CMake-hdf5-1.8.17/hdf5-1.8.17/src/H5Dint.c line 455 in H5D__create_named(): unable to create and link to dataset
  major: Dataset
  minor: Unable to initialize object
  ......
- September 7, 2023 at 6:33 pm
  
  Lito Yap
  Ansys Employee
  
  There are certain requirements and limitations when running FDTD with GPU. Not all FDTD simulations will run with GPU. Please see the Knowledge Base (KB) for more information. > FDTD GPU Solver Information – Ansys Optics

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