>ACCESS 97
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>I am trying to update 2 fields in a table. Both of the fields are numerics. The first of these fields updates but the second field (CYCLE) gives me a field not updatable error. The form is based on a query linking 2 tables on the trknum field.
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DoCmd.RunSQL ("update prototype set trknum = " & mtxt0 & ", cycle = " & mtxt1 & ";")

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>I'm not sure what settings to check and or change to correct this and make the field updatable. Any ideas?

Many possible reasons, can you post the SQL from the query?

For example: using DISTINCT, wrong side of one to many relation, using aggregate functions, no primary key for the table to be updated, etc.