Got below error message in the import log when trying to import data into to existing users profile. I had the overwrite option set and the username was in the source file and mapped. However b not the email, must the emails also be set/imported? 

 

**** Error attempting to add record:1 The parameter 'Email' must not be empty. Parameter name: Email at System.Web.Util.SecUtility.CheckParameter(String& param, Boolean checkForNull, Boolean checkIfEmpty, Boolean checkForCommas, Int32 maxSize, String paramName) at System.Web.Security.SqlMembershipProvider.UpdateUser(MembershipUser user) at System.Web.Security.MembershipUser.Update() at System.Web.Security.Membership.UpdateUser(MembershipUser user) at DotNetNuke.Security.Membership.AspNetMembershipProvider.UpdateUserMembership(UserInfo user) at DotNetNuke.Security.Membership.AspNetMembershipProvider.UpdateUser(UserInfo user) at DotNetNuke.Entities.Users.UserController.UpdateUser(Int32 portalId, UserInfo objUser) at DataSprings.DNN.Modules.UserImport.UserImportProcess.DoUserImport()

Same import with an email address included works.

Also in the manual it states that the "UserID" is mandatory but it should state "UserName" (plus "Email")

I would like email address to not be needed.

Also I would like an option(true/false) individually field selected if import should overwrite existing value or not, if the import file data field is empty.

Solved.

TIP...

If “Require unique email address” in the DNN membership provider settings is switch on, then the importer requires email address in the import file for both for updates and creation of new accounts. Also you can’t then use the importer to update/change email address for existing user accounts.

Probably no one switches this on by accident because it requires a change in the web config file. Anyway took a couple of emails from Chad to help me track it down but now we know.