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Pervasive ODBC Client Interface Invalid precision value error

Posted on 2004-09-09
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I have just started having this problem on some workstations running Access 2k.  I have an Access application that uses an ODBC connection (Pervasive SQL 2000) to some customer tables in an Accounting system.  There is a Make Table query in Access that creates a temporary table of data from one of the linked ODBC tables.  Recently, on some of the workstations whenever this query is executed I get the following error:

[Pervasive][Pervasive ODBC Client Interface] Invalid precision value (#0)

Other workstations in the same environment can run the query without getting the error.

Any ideas or help will be greatly appreciated.

Thanks
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Question by:Eric Sherman
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by:Brendt Hess
ID: 12114619
Hmmm.... the first thing that I would look at - is the MDAC version the same on all of the machines having the problem, and is it different on the other machines.  A lot of MS products automatically update MDAC

Second: The Invalid Precision Value error can indicate a number of things.  In this case, it may indicate that the temp table that is created does not actually match the data sizes being returned for one or more columns.  Since this may be an infrequent error type (e.g. a City field defined as Length 15 in Access, 20 in Pervasive, but only a couple of cities with more than 15 characters in their names), it may look like it is only on some workstations because those stations access information related to the long-named city.

The definition of the tables (fieldnames can be obfuscated - types and sizes are important) would be helpful here.
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by:Eric Sherman
ID: 12114804
Thanks bhess1,

The source table in the accounting system is very large (over 25 - 30 fields).  I did manage to isolate the problem down to the Pervasive ODBC driver though.  Rather than link to the tables, I imported the source table from the accounting application and it works fine on all workstations without any errors.  Bypassing the ODBC linked table confirms that the Visual Basic code is all OK and the problem is in the was Access reads the Numeric Decimal fields using the ODBC driver and that's what returning the Invalid Percision Value error.  Just haven't figured out how to fix it yet.

Much appreciated,

ET
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Brendt Hess earned 2000 total points
ID: 12116556
This could be related to a definition problem, if the total number of digits is > 15 in the Numeric fields.  From the ODBC specifications:

Decimal:  Signed, exact, numeric value with a precision of at least p and scale s. (The maximum precision is driver-defined.)
(1 <= p <= 15; s <= p).[4]

Numeric:  Signed, exact, numeric value with a precision p and scale s (1 <= p <= 15; s <= p).[4]

[4]   SQL_DECIMAL and SQL_NUMERIC data types differ only in their precision. The precision of a DECIMAL(p,s) is an implementation-defined decimal precision that is no less than p, while the precision of a NUMERIC(p,s) is exactly equal to p.

If Access sometimes maps Decimal as Numeric, then it could have a precision problem if the decimal field is > 15 digits.
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