topic Could not lock field in QlikView https://community.qlik.com/t5/QlikView/Could-not-lock-field/m-p/312041#M1307380 <HTML><HEAD></HEAD><BODY><P style="background-color: white; margin: 0px 0px 0px 18pt;">Could not lock field. Fieldname=UserGroupForPublisher<BR />AddSelections failed. Field could not be selected. Check that the field exists and the selected values is available. FieldName=UserGroupForPublisher<BR />AddSelections failed. Field could not be selected. Check that the field exists and the selected values is available. FieldName=USER<BR />The task "Distribute task (production) - UserGroup 10" failed. ErrorCount=4<BR /><SPAN>Exception=System.Net.Mail.SmtpException: Mailbox unavailable. The server response was: 5.1.7 &lt;</SPAN><A class="jive-link-email-small" href="mailto:xyz@abc.com" target="_blank">xyz@abc.com</A><SPAN>&gt;... Unknown sender&nbsp; </SPAN></P><P style="background-color: white; text-indent: 18pt;">at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)&nbsp;&nbsp;&nbsp; </P><P style="background-color: white; margin: 0px 0px 0px 18pt;">at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException&amp; exception)&nbsp; </P><P style="background-color: white; margin: 0px 0px 0px 18pt;">at System.Net.Mail.SmtpClient.Send(MailMessage message)<BR />at QDSMain.SMTPServerResource.SendMail2(ILogBucket i_LogBucket, SmtpClient i_SmtpClient, MailMessage i_MailMessage)</P></BODY></HTML> Mon, 26 Jan 2026 18:19:17 GMT 2026-01-26T18:19:17Z Could not lock field https://community.qlik.com/t5/QlikView/Could-not-lock-field/m-p/312041#M1307380 <HTML><HEAD></HEAD><BODY><P style="background-color: white; margin: 0px 0px 0px 18pt;">Could not lock field. Fieldname=UserGroupForPublisher<BR />AddSelections failed. Field could not be selected. Check that the field exists and the selected values is available. FieldName=UserGroupForPublisher<BR />AddSelections failed. Field could not be selected. Check that the field exists and the selected values is available. FieldName=USER<BR />The task "Distribute task (production) - UserGroup 10" failed. ErrorCount=4<BR /><SPAN>Exception=System.Net.Mail.SmtpException: Mailbox unavailable. The server response was: 5.1.7 &lt;</SPAN><A class="jive-link-email-small" href="mailto:xyz@abc.com" target="_blank">xyz@abc.com</A><SPAN>&gt;... Unknown sender&nbsp; </SPAN></P><P style="background-color: white; text-indent: 18pt;">at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)&nbsp;&nbsp;&nbsp; </P><P style="background-color: white; margin: 0px 0px 0px 18pt;">at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException&amp; exception)&nbsp; </P><P style="background-color: white; margin: 0px 0px 0px 18pt;">at System.Net.Mail.SmtpClient.Send(MailMessage message)<BR />at QDSMain.SMTPServerResource.SendMail2(ILogBucket i_LogBucket, SmtpClient i_SmtpClient, MailMessage i_MailMessage)</P></BODY></HTML> Mon, 26 Jan 2026 18:19:17 GMT https://community.qlik.com/t5/QlikView/Could-not-lock-field/m-p/312041#M1307380 2026-01-26T18:19:17Z