# Grin ++ & Grinmint Finalize Transaction error
**URL:** https://forum.grin.mw/t/grin-grinmint-finalize-transaction-error/5482
**Category:** Tech Support
**Created:** [July 10, 2019, 11:07am UTC](https://forum.grin.mw/t/grin-grinmint-finalize-transaction-error/5482 "2019-07-10T11:07:25Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@distribcomp](https://forum.grin.mw/u/distribcomp)
#### Post date: [July 10, 2019, 11:07am UTC](https://forum.grin.mw/t/grin-grinmint-finalize-transaction-error/5482/1 "2019-07-10T11:07:25Z")
I recently upgraded to grin++ v0.6.1 for Windows. I mine on Grinmint and I withdraw from the pool via file method. The wallet recognizes in incoming file and generates a response. When I upload the response to grinmint I receive an error that the file is invalid.
Any help would be appreciated!
Thank you!
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### Author:  [@david](https://forum.grin.mw/u/david)
#### Post date: [July 10, 2019, 3:40pm UTC](https://forum.grin.mw/t/grin-grinmint-finalize-transaction-error/5482/2 "2019-07-10T15:40:11Z")
HI @distribcomp,
@quentinlesceller tracked down the issue, and added a patch to libgrin on the Grinmint side to resolve the incompatibility. I’ll make some additional changes in Grin++ 0.6.2 just for good measure, but you should be good to go now.
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### Author:  [@distribcomp](https://forum.grin.mw/u/distribcomp)
#### Post date: [July 11, 2019, 9:10am UTC](https://forum.grin.mw/t/grin-grinmint-finalize-transaction-error/5482/3 "2019-07-11T09:10:23Z")
Perfect! I successfully processed a transfer from the pool. Thank you very much for the fast response!