# AT+WOPEN=3 throws error

**URL:** <https://forum.sierrawireless.com/t/at-wopen-3-throws-error/5163>\
**Category:** Open AT\
**Created:** [July 26, 2011, 9:52am UTC](https://forum.sierrawireless.com/t/at-wopen-3-throws-error/5163 "2011-07-26T09:52:31Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![sandysoft](https://avatars.discourse-cdn.com/v4/letter/s/0ea827/32.png) [@sandysoft](https://forum.sierrawireless.com/u/sandysoft)\
**Post date:** [July 26, 2011, 9:52am UTC](https://forum.sierrawireless.com/t/at-wopen-3-throws-error/5163/1 "2011-07-26T09:52:31Z")

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As per API description, AT+WOPEN=3 should clear user area of flash. But I am seeing error on this AT command. Any suggestions?

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**Author:** ![lqmanhkeem](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lqmanhkeem](https://forum.sierrawireless.com/u/lqmanhkeem)\
**Post date:** [July 26, 2011, 10:03am UTC](https://forum.sierrawireless.com/t/at-wopen-3-throws-error/5163/2 "2011-07-26T10:03:14Z")

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you only can clear area of flash, only if the application is stopped.

stop your application first with at+wopen=0, then erase it with at+wopen=3

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**Author:** ![sandysoft](https://avatars.discourse-cdn.com/v4/letter/s/0ea827/32.png) [@sandysoft](https://forum.sierrawireless.com/u/sandysoft)\
**Post date:** [July 26, 2011, 10:04am UTC](https://forum.sierrawireless.com/t/at-wopen-3-throws-error/5163/3 "2011-07-26T10:04:49Z")

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Thanks a lot… very logical… missed it.  
Wil try that and update…

Sandeep

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**Author:** ![lqmanhkeem](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lqmanhkeem](https://forum.sierrawireless.com/u/lqmanhkeem)\
**Post date:** [July 26, 2011, 10:26am UTC](https://forum.sierrawireless.com/t/at-wopen-3-throws-error/5163/4 "2011-07-26T10:26:29Z")

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did U try it ?

success or not ?

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**Author:** ![sandysoft](https://avatars.discourse-cdn.com/v4/letter/s/0ea827/32.png) [@sandysoft](https://forum.sierrawireless.com/u/sandysoft)\
**Post date:** [July 26, 2011, 10:28am UTC](https://forum.sierrawireless.com/t/at-wopen-3-throws-error/5163/5 "2011-07-26T10:28:12Z")

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hi,  
I will do it in the evening…  
I dont have access to HW right now…

Sandeep