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When I try to write a BLOB field using the TVirtualQuery.LoadFromStream() function I get the error:

Project .. raised exception class $C0000005 with message 'access violation at 0x009da93a: read of address 0x00000010'.

This only occurs with TVirtualQuery (in the TVirtualTable, TUniTable or TUniQuery components the field is written without errors).

How to solve this?

I´m using:
Delphi 10.2 Update 3
Unidac 7.3.9

See the sample program at the link below:

https://1drv.ms/u/s!Al-1RWjYXpnaj_NhKVvvWuu3Zbrhjw

Thank you for the information. We will investigate the described issue and let you know the results shortly.

Just to your knowledge, I tested it with "Night Build" (downloaded today) and the same problem occurred.

Please, let me know when you have a new "night build" with this issue resolved because due to this error I had to suspend the development.

Thank you.

Thank you for the information. We reproduced the issue with AV, as soon as we get a result, we will let you know.

Can you let me know when the correction for this issue will be released?

Thank you for the information. We have reproduced the problem and fixed the bug. The fix will be included in the next UniDAC build. Currently, we can send you a night build of UniDAC with the fix. For this, please specify your license number and the exact version of Delphi you are using via the e-support form (https://www.devart.com/company/contactform.html)

Thanks, but this change solved the AV only in the INSERT commands.

AV remains in the UPDATE command.

Sample project in this link:
https://1drv.ms/u/s!Al-1RWjYXpnaj_5wlZ97nnpykkiSTg

Thank you for the information. We have reproduced the issue and will investigate its origin. We will inform you about the results shortly.

I need to release the new version of my application to my users but to do this, I need this problem solved.

Can you let me know when the correction for this issue will be released?

We plan to release our products build including the required changes next week. Currently, we can send you a night build with these fixes. For this, specify the IDE version you are interested in using via the e-support form (https://www.devart.com/company/contactform.html)

Thank you very much.

I installed the night build and I no longer receive the error message, however, when updating a blob field (UPDATE) instead of the image it writes ????.

Sample project in this link:

https://1drv.ms/u/s!Al-1RWjYXpnakIBZjUSkBKbhwC5PGA

I need a quick fix for these Virtual Table issues because this prevents me from releasing my application to my users.

Thank you for the information. We have reproduced the issue and will investigate its origin. We will inform you about the results shortly.

Bug with AV when editing a record in TVirtualQuery having BLOB columns is fixed. The fix will be included in the next build of our product, which we are planning to release next week.

Is it possible to release an NB with this change so that I can start the final test of my application?