Scenario 

User Search Code, Error Occurs Invalid Blob.

When Search on Tax Code Error Occurs (Delphi)

Solution 

Step 1 -  C:\Program Files (x86)\Common Files\Borland Shared\BDE

Note : Run as Admin.

Step 2 – Click Configuration > Expand Driver > Expand Native > Click Interbase >Change Blob size to 64.

Blob to cache 256 .

After Changes had make > Click Object Click Apply .

After Click Apply below screen will pop out > Click OK .

After Click OK Below Screen Will POP Out > Click OK again .

Then Restart PC > Login QnE Business Solution , Try Search the GST Code .