A parameter is a value supplied at runtime.
If your query is popping up a box and asking for a value when you do not
intend that, try these:
1. Look for anything in the query that could be a misspelled field or table
name or alias.
2. If you have spaces or other non-alphabetic characters in your
field/table/alias names, surround them with square brakets.
3. Don't expect Access to interpret the alias for a calculated field in the
WHERE clause etc. Repeat the expression.
4. It is also possible to declare a parameter. Look at Parameters on the
Query menu.
5. If the query works fine, but a report asks for a parameter, look for
something on the report that is spelled differently, e.g. in the Control
Source of a text box, in the Sorting'n'Grouping dialog, or in the report's
Filter or Order By properties.
