MS Access query not receiving parameter from VBA - sql

Question

I have an append query that copies values from one table (tbl_LSI) to another (tbl_LSI_USD):
qry_Append_to_LTI_USD:
INSERT INTO tbl_LTI_USD
SELECT *
FROM tbl_LTI AS lti
WHERE lti.LTI_ID=[Forms]![frm_LTI]![LTI_ID];
I call this query on the AfterUpdate event of the form frm_LTI, where it takes the LTI_ID from the field LTI_ID. The VBA I use is:
db.Execute "qry_Append_to_LTI_USD", dbFailOnError
I have this exact same code working for a different form & table combination, but for some reason when I try and execute this one it fails and asks for a parameter:
Run-time error '3061'
Too few parameters. Expected 1
The only difference between the forms is that this one (frm_LTI) is modal & popup = Yes, whereas the working form modal & popup = No
The VBA code can see and debug.print the value [frm_LTI]![LTI_ID], but it doesn't get passed to teh query. (I have a screenshot showing this, but not enough reputation points to upload it).
Is this anything to do with the form's modal/popup property, or is there something else I'm missing?

Answer 1

When you have such problems with Execute, a specially with pivot queries with sub queries. Try to replace WHERE lti.LTI_ID=[Forms]![frm_LTI]![LTI_ID]; with this WHERE lti.LTI_ID=eval("[Forms]![frm_LTI]![LTI_ID]");. But sometimes type cast also needed(for dates as example): WHERE lti.LTI_ID=cDbl(eval("[Forms]![frm_LTI]![LTI_ID]"));