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Field is not a Blob

Posted on 1997-08-12
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Last Modified: 2010-04-04
I'm getting the error message 'Field is not a Blob' when opening a TTable object with cached updates set to true, the underlying paradox table contains a Memo field and a TDBMemo points to this field.
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Question by:Wilfred
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4 Comments
 

Expert Comment

by:hkelmer
ID: 1341236
Hi wilfred,
cached updates set to true, the underlying paradox table
i´m not sure about what exactly is your error. please send
more comments. Just in case try the following
close your table in the form design and double click the table
componet to see what fields have you added. clean them all and
put them back again. if this not work, delete your datasource and put a new one (just to ensure that those components are uptodate with your table structure.
hope this can help you
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Expert Comment

by:hkelmer
ID: 1341237
Hi wilfred, cached updates set to true, the underlying paradox table i´m not sure about what exactly is your error. please send
more comments. Just in case try the following close your table in the form design and double click the table componet to see what fields have you added. clean them all and put them back again. if this not work, delete your datasource and put a new one (just to ensure that those components are uptodate with your table structure.
                     hope this can help you
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Author Comment

by:Wilfred
ID: 1341238
Hello hkelmer,

I had already tried what you suggested but it didn't help. I'll rephrase my question.

1. put a TTable, TDataSource and a TDBMemo on a form.
2. Connect TDataSource to TTable.
3. Connect TTable to a paradox table containing a memo field.
4. Connect TDBMemo to TDataSource.
5. Set TTables cached updates to true.
6. Open TTable.

when opening the table I get the error message 'Field is not a Blob'.


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Accepted Solution

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KE earned 100 total points
ID: 1341239
I don't think you will like this answer:

BlopFields are NOT supported by cached updates, which i believe have something to do with their nature.
10 rows of 20Mb cached Blops don't fit well into 32Mb RAM.

Kenneth Ellested

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