Hi All,

I've recently upgraded from CRM 3.0 to 4.0 and to IFD now. I'm facing an issue with re-assigning account to another user. This issue is happening to some accounts only. For other accounts the assign functionality is working fine.

The error I'm facing is 'Invalid Argument ' Error

I traced the error and found the below error 'There should be only one owner party for an activity '. There are two activities in the 'activitypartybase' with that account. One with the owner as 'account name' and another with the owner as the user who owns the account. I thought of deleting the record and decided against it as it is not a supported way. Through CRM application I can see only the second activity.

I've also installed CRM Rollup Update 10 and 11 after upgrading to CRM 4.0.

I've also gone through the below links, but couldn't find the resolution for my issue.

http://social.microsoft.com/Forums/en-US/crm/thread/9a256e32-02d6-4f8b-8cb1-0fbd4cf78b40?prof=required

http://social.microsoft.com/Forums/en-US/crmdeployment/thread/d82cedee-e24e-4abc-9ec6-41306b89ed3b

I thought of asking your thoughts and suggestions before going to Microsoft Support.  Kindly let me know if anyone knows the resolution. Thanks.