Error "Function DimensionAttributeValueSetStorage.addItemValues has been incorrectly called. "

I have added a new form control and added a lookup in the method. My code looks like this. Everytime I keying a relevant financial dimension into the new form control, I get error "Function DimensionAttributeValueSetStorage.addItemValues has been incorrectly called." Please can you help?

public void lookup()
{
SysTableLookup sysTableLookup;
QueryBuildDataSource queryBuildDataSource;
QueryBuildRange queryBuildRange;
Query query = new Query();
DimensionAttribute dimAttr = DimensionAttribute::find(LedgerParameters::find().TSJournalSubcodeAttribute);
;

sysTableLookup = SysTableLookup::newParameters(tableNum(DimensionFinancialTag), this);
sysTableLookup.addLookupfield(fieldNum(DimensionFinancialTag, Value));
sysTableLookup.addLookupfield(fieldNum(DimensionFinancialTag, Description));

queryBuildDataSource = query.addDataSource(tableNum(DimensionFinancialTag));
queryBuildDataSource.addOrderByField(fieldnum(DimensionFinancialTag, Value));

sysTableLookup.parmQuery(query);

if (sysTableLookup)
{
sysTableLookup.performFormLookup();
}
}