Error-message about repeat-group

User Support Form Building
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Error: ODK Validate Errors:

Something broke the parser. See above for a hint.
Error evaluating field ‘grpOrgFamil’ (${grpOrgFamil}[1]): The problem was located in Condition expression for ${grpOrgFamil}
XPath evaluation: type mismatch
This field is repeated:

${grp_menage}[1]/grpTablMen[1]/q007NumLign[1];${grp_menage}[1]/grpTablMen[2]/q007NumLign[1]

You may need to use the indexed-repeat() function to specify which value you want.
Caused by: org.javarosa.xpath.XPathTypeMismatchException: The problem was located in Condition expression for ${grpOrgFamil}
XPath evaluation: type mismatch
This field is repeated:

${grp_menage}[1]/grpTablMen[1]/q007NumLign[1];${grp_menage}[1]/grpTablMen[2]/q007NumLign[1]

You may need to use the indexed-repeat() function to specify which value you want.
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Welcome to the community, @yaojean! You will need to check the variable grpOrgFamil in your XLSForm to find the issue. Validating your XLSForm through this online validator should also help you identify syntax issues if any present within your XLSForm.