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I want to set an environment variable in Windows 10, but it fails with an error:

This environment variable is too large. This dialog allows setting values up to the 2047 characters.

I'm learning React-Native and using android studio, I want to include the path to abd.exe in my %PATH% environment variable.

I tried to fix this by removing some of the values in the PATH variable, but I still get this same error.

Error Screenshot:

env variable too large error

I will appreciate this if anyone can assist me to solve this problem.

Thank you in advance for your assistance

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2 Answers 2

Reset to default
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I would recommend cleaning the PATH variable up, removing anything you no longer need. You can also reduce the length by adding new environment variables like

x86 = %ProgramFiles(x86)% x64 = %ProgramFiles%

And refer to them by %x86%, etc. This also makes the PATH variable more manageable.

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2 Comments

you can even include `C:\` to optimize a bit further.
Yes, this is true. Windows should have shorter variable names and Winget should use them more often. I got the same problem after installing several tools with Winget and now I have to do the cleaning manually.
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It seems to me that a recent Windows Update changed the allowed length of an environment variable from 4095 to 2047. I hope this is a bug not a feature. I have the same issue, getting error trying to save unmodified PATH environment variable results in "This variable is too large" error.

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