Fixing Git pull errors in SourceTree

Monday, 10 April 2017 01:44 Stefano Tommesani
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If you encounter the following error when pulling a repository in SourceTree:

VirtualAlloc pointer is null, Win32 error 487

it is due to to the Cygwin system failing to allocate a 5 MB large chunk of memory for its heap at the fixed address 0x68570000, while only a hole 2.5 MB large was apparently available there (see the whole thread on SO). Unfortunately, attempts to rebase MSYS or other tricks are not working, requiring a full reboot of the PC to properly complete pulls.

To resolve this problem once and for all, upgrade the Git used by SourceTree from version 1.x to version 2: click on Tools | Options, select the Git tab and check the version, in this case it is "System Git version 1.8.4".

GitUpdate1

As we are still using Git 1.x, click on Update Embedded Git and confirm that we want to download the embedded version:

GitUpdate2

SourceTree will then download the new version of Git (notice that the current version at the time of writing is 2.10.2)

GitUpdate3

And that's it! The embedded version of Git is now updated to 2.x, we switch to the embedded Git by clicking on the "Use Embedded Git" button, and the error is gone for good

GitUpdate4

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Last Updated on Friday, 28 April 2017 13:12