I’m using hrbrmster’s freepst package to read a series of .pst files (Microsoft Outlook data files) into R. The freepst package is an rJava wrapper around java-libpst. When I try reading in most (but not all) of my .pst files using freepst::read_pst(), I get the following error:

Error in .jcall("RJavaTools", "Ljava/lang/Object;", "newInstance", class,  : 
  com.pff.PSTException: Unable to find 97 is desc: true

The 97 changes to different numbers depending on the file, and sometimes the true becomes a false, weirdly. And for a handful of files the function seems to work fine.

I’m not very familiar with Java or rJava and am not sure how to troubleshoot. Can anyone explain what this means, or propose a solution? Thanks in advance!