# Why did I sync path to vc failed?

**URL:** <https://tech-community.robotics.abb.com/t/why-did-i-sync-path-to-vc-failed/851>\
**Category:** RobotStudio\
**Created:** [September 12, 2006, 8:50am UTC](https://tech-community.robotics.abb.com/t/why-did-i-sync-path-to-vc-failed/851 "2006-09-12T08:50:22Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![seekhust](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@seekhust](https://tech-community.robotics.abb.com/u/seekhust)\
**Post date:** [September 12, 2006, 8:50am UTC](https://tech-community.robotics.abb.com/t/why-did-i-sync-path-to-vc-failed/851/1 "2006-09-12T08:50:22Z")

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Hello,

There is something wrong with my RS.

When I sync the path to the virtual controller,It failed.

The VC is in the auto mode.

Why? Who can answer my question?

Thanks!

This is the log:

Starting sync procedure 2006-09-12 14:57:18  
Sync started  
 New reference(s) to existing data tTCP1 tooldata added  
 Module Pickup1 was not found

//comment: I changed the path name(change pickup to ConvMot),and didn’t select sync to Module-Pickup1(its original module,but I changed sync module too),Why did it create Pickup1 and sync to pickup1

Module Pickup1 created  
 New data Home robtarget created  
 New global data Pickup1 robtarget has same name as existing global object in  
 New data Pickup1 robtarget created  
Sync aborted  
Synchronization of element CnvMot failed.  
2006-09-12 14:57:18

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**Author:** ![Anders\_S](https://avatars.discourse-cdn.com/v4/letter/a/ce7236/32.png) [@Anders\_S](https://tech-community.robotics.abb.com/u/Anders_S)\
**Post date:** [September 21, 2006, 10:45am UTC](https://tech-community.robotics.abb.com/t/why-did-i-sync-path-to-vc-failed/851/2 "2006-09-21T10:45:24Z")

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Hi,

That the synchronization fails can depend on different reasons. For example if you have reference or syntax errors in the Virtual Controller, the sync. will fail.

In your case I recommend that you go to the Program menu and select “Clear Synchronization History” before you sync. If that doesn’t help cold start the controller (but then will you lose the program in the VC).

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**Author:** ![seekhust](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@seekhust](https://tech-community.robotics.abb.com/u/seekhust)\
**Post date:** [September 25, 2006, 7:50am UTC](https://tech-community.robotics.abb.com/t/why-did-i-sync-path-to-vc-failed/851/3 "2006-09-25T07:50:53Z")

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Hi,Anders

I clear synchronization histroy,then it work very well.

Thank you so much.

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**Author:** ![Yandisa](https://avatars.discourse-cdn.com/v4/letter/y/bc79bd/32.png) [@Yandisa](https://tech-community.robotics.abb.com/u/Yandisa)\
**Post date:** [October 12, 2015, 3:03pm UTC](https://tech-community.robotics.abb.com/t/why-did-i-sync-path-to-vc-failed/851/4 "2015-10-12T15:03:38Z")

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How do you clear the synchronisation hisory Seekhust?

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**Author:** ![jthyge](https://avatars.discourse-cdn.com/v4/letter/j/8edcca/32.png) [@jthyge](https://tech-community.robotics.abb.com/u/jthyge)\
**Post date:** [May 1, 2020, 8:52am UTC](https://tech-community.robotics.abb.com/t/why-did-i-sync-path-to-vc-failed/851/5 "2020-05-01T08:52:44Z")

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I have same issue, where do i find “Clear Synchronization History” in RS 2019?

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**Author:** ![Anders\_S](https://avatars.discourse-cdn.com/v4/letter/a/ce7236/32.png) [@Anders\_S](https://tech-community.robotics.abb.com/u/Anders_S)\
**Post date:** [May 4, 2020, 7:01am UTC](https://tech-community.robotics.abb.com/t/why-did-i-sync-path-to-vc-failed/851/6 "2020-05-04T07:01:11Z")

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“Clear synchronization history” does not exist in RS 2019. The answer from 2006 above was for RobotStudio 4.x for S4 systems.