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psana -o psana.l3t-accept-only=0 ...

Or you can add the option to your psana configuration file (if you are using one):

[psana]
l3t-accept-only=0

It seems that for as much as 5% of the time, CsPad DataV2 is not in the Event

The only distinction between CsPad DataV1 and DataV2 is the sparsification of particular sections as given in the configuration object. That is DataV2 may be sparser. The actual hardware is kicking out DataV1 but the DAQ event builder is making a DataV2 when it can. Sometimes the DAQ sends the original DataV1 instead of the DataV2. This can be due to limited resources, in particular competition with resources required for compressing cspad in the xtc files. If you do not find a DataV2 in the Event, look for a DataV2

Hdf5

Topics specific to hdf5

Why is there both CsPad DataV2 and CsPad DataV1 in the translation?

The only distinction between CsPad DataV1 and DataV2 is the sparsification of particular sections as given in the configuration object. That is DataV2 may be sparser. The actual hardware is kicking out DataV1 but the DAQ event builder is making a DataV2 when it can. Sometimes the DAQ isends the original DataV1 instead of the DataV2. This can be due to limited resources, in particular competition with resources required for compressing cspad in the xtc files.

How do I write hdf5 files from C++ or Python

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