Downdating TeX Live

[Philip Taylor]

Tim Eyre, Shunsaku Hirata, Akira Kakuto and I are together trying to 
find out why Tim's copy of "xdvipdfmx" (xdvipdfmx Version 20201111), run 
under Windows 10, occasionally (but very unreliably) crashes  as follows :

> Error -1073741819 (driver return code) generating output
> In Windows, -1073741819 = 0xC0000005 = Access Violation

On my Windows 7 64-bit (Enterprise) system, I could not reproduce the 
problem after 50 000 iterations using "xdvipdfmx" version 20200526.

In order to try Tim's later version, I did one of my occasional "tlmgr 
update --self --all --verify-repo=none"s, but that is still taking place 
and, at the moment at least, "xdvipdfmx" is locked.  I /can/ access 
"dvipdfmx", and that reports "This is dvipdfmx Version 20210109 by the 
DVIPDFMx project team".  So, two questions :

 1. If "dvipdfmx" reports "This is dvipdfmx Version 20210109 by the
    DVIPDFMx project team", will "xdvipdfmx" similarly report "This is
    xdvipdfmx Version 20210109 by the DVIPDFMx project team" ?
 2. If so, how can I downdate my TeX Live installation to give me
    "xdvipdfmx Version 20201111" ?

Philip Taylor


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