I opened up the Developer Command Prompt for VS 2019 which sets all the environment variables. The window openned up in the directory C:\Program Files (x86)\Microsoft Visual Studio\2019\Community. I searched under the directory for .BAT files named like vcvars.bat but did not find anything. However under C:\Program Files (x86)\Microsoft Visual Studio\2017 I did find "vars" batch files. I did try the vcvars64.bat frile earlier and the upgrade attempt ended in error.

In reply to Re^4: error upgrading DBI module (vcvarsall.bat) by expo1967
in thread error upgrading DBI module by expo1967

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