I'm getting to the end of my knowledge here :-)
Two more suggestions and if they don't help you, you'll have to reach out to my colleagues at tech support (
support@precisely.com)
1. Try right-clicking the file
ExtensibilityReferenceHelp.exe and then select
Run As Administrator to launch it.
2. Try doing the same to start MapInfo Pro by right-clicking the MapInfo Pro shortcut.
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Peter Horsbøll Møller
Principal Presales Consultant | Distinguished Engineer
Precisely | Trust in Data
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Original Message:
Sent: 09-04-2022 19:13
From: Maria Sousa
Subject: Extensibility Reference Guide not working
Hi Peter.
I don't have the Extensibility folder on my end, maybe it's an installation problem (same for mapbasic). I do have them for the previous version, but don't want to delete anything just in case.

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Maria Sousa
WOOLWORTHS GROUP LTD
Bella Vista NSW
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Original Message:
Sent: 09-02-2022 03:39
From: Peter Møller
Subject: Extensibility Reference Guide not working
Can you check if this helps:
https://customer.precisely.com/s/article/How-to-resolve-missing-Help-Menu-Documentation-when-opening-help-file-in-MapInfo-Pro-64-bit
This refers to some issues with the cache files that can be fixed by removing the cache file which then will be recreated afterward.
Try renaming the ExtensibilityReference folder.
A new should get created when you run the help file

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Peter Horsbøll Møller
Principal Presales Consultant | Distinguished Engineer
Precisely | Trust in Data
Original Message:
Sent: 09-02-2022 03:18
From: Maria Sousa
Subject: Extensibility Reference Guide not working
Hi Peter.
Yes I tried that and same result.
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Maria Sousa
WOOLWORTHS GROUP LTD
Bella Vista NSW
Original Message:
Sent: 09-02-2022 02:17
From: Peter Møller
Subject: Extensibility Reference Guide not working
Hi Maria
Do you get the same error if you try to launch the help system from the MapInfo Pro installation folder?
Try double-clicking on the file ExtensibilityReferenceHelp.exe in the Documentation subfolder
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Peter Horsbøll Møller
Principal Presales Consultant | Distinguished Engineer
Precisely | Trust in Data