# C5 to C10 issue

**URL:** <https://clarionhub.com/t/c5-to-c10-issue/1660>\
**Category:** questions\
**Created:** [January 27, 2018, 1:32am UTC](https://clarionhub.com/t/c5-to-c10-issue/1660 "2018-01-27T01:32:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Patrice\_Eligwe](https://clarionhub.com/user_avatar/clarionhub.com/patrice_eligwe/32/886_2.png) [@Patrice\_Eligwe](https://clarionhub.com/u/Patrice_Eligwe)\
**Post date:** [January 27, 2018, 1:32am UTC](https://clarionhub.com/t/c5-to-c10-issue/1660/1 "2018-01-27T01:32:48Z")

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I am in the process of migrating from C5b to C10 but having an issue getting  
C10 to compile a C5b dll. I have added C5b to the C10 IDE, updated the C5b  
redirection file, imported all C5 templates, fixed any errors in the C5 TPW  
files and created what looks like a functioning C5b environment. At first I  
thought it was my C5b dll so created a new empty C5b dll but am still getting  
the same error, “An unexpected error occured while building this project -  
C:\Users\pelig\Documents\Projects\Clarion\EIC\5\eic.cwproj:1” This error  
gives me no information as to what is causing the problem and I am at a loss  
as to where to go next. Help and/or some direction from anyone, would be  
greatly appreciated. As a side note, I am on WIN10 and I do restart C10  
whenever I change Clarion versions.

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**Author:** ![seanh](https://clarionhub.com/letter_avatar_proxy/v4/letter/s/4af34b/32.png) [@seanh](https://clarionhub.com/u/seanh)\
**Post date:** [January 30, 2018, 12:20am UTC](https://clarionhub.com/t/c5-to-c10-issue/1660/2 "2018-01-30T00:20:48Z")

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You might try deleting the cwprj and allowing the system to recreate it. That might do something.

I’m also not sure if the compiler and linker of C5 was 32 bit, if not and you’re running a 64bit version of windows then it would fail.

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**Author:** ![Patrice\_Eligwe](https://clarionhub.com/user_avatar/clarionhub.com/patrice_eligwe/32/886_2.png) [@Patrice\_Eligwe](https://clarionhub.com/u/Patrice_Eligwe)\
**Post date:** [February 6, 2018, 6:49pm UTC](https://clarionhub.com/t/c5-to-c10-issue/1660/3 "2018-02-06T18:49:34Z")

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i have been debating if WIN10 could be the issue. Thanks for the help.