I have recently installed IDL 8.7.2 on my Linux x64 laptop. Whenever I try to use H5_PARSE I run into the following error:

H5_PARSE: Attempt to call undefined function: 'ORDEREDHASH'.

This happens for instance when I try run the example for the H5_PARSE man page:

prompt> File = FILEPATH('hdf5_test.h5', SUBDIR=['examples','data'])
prompt> Result = H5_PARSE(File)
% H5_PARSE: Attempt to call undefined function: 'ORDEREDHASH'.
% Execution halted at: $MAIN$

Many thanks in advance for any help.