Firebird: An attempt was made to load a program with an incorrect format (Exception from HRESULT:0x8007000B)


System Type: 64-bit OS, x64-based processor

Front End: MS Visual Studio 2010

Backend: Firebird database v2.5.0 64-bit Server type: Embedded type (NOTE: Standalone Server v2.5.0 is also present in my system) Firebird .NET Provider v2.5.0

NB: There are some special reasons why I'm using such old version of VS & Firebird database

Project Platform target: x64

When running my application, I get the error:

An attempt was made to load a program with an incorrect format (Exception from HRESULT:0x8007000B)

The above error is generated when in Add Connection-> TableAdapter Configuration wizard and Server type is Embedded, however there is no error when the server type is Standalone.

My app.config looks like:

<?xml version="1.0"?>
    <add name="dbConFirebirdSQL" connectionString="User=SYSDBA;Password=masterkey;Database=INSMANEMBED.fdb;DataSource=localhost;Port=3050;Dialect=3;Charset=NONE;Role=;Connection lifetime=15;Pooling=true;MinPoolSize=0;MaxPoolSize=50;Packet Size=8192;ServerType=1;"/>
      <remove invariant="FirebirdSql.Data.FirebirdClient"/>
      <add name="FirebirdSql.Data.FirebirdClient" invariant="FirebirdSql.Data.FirebirdClient" description="Firebird Data Provider for .NET" type="FirebirdSql.Data.FirebirdClient.FirebirdClientFactory, FirebirdSql.Data.FirebirdClient, Culture=neutral, PublicKeyToken=3750abcc3150b00c" />
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>

Some files present in bin\debug are

  • fbembed.dll
  • firebird.conf
  • firebird.msg
  • ib_util.dll
  • icudt30.dll
  • icuin30.dll
  • icuuc30.dll
  • msvcp80.dll
  • msvcr80.dll
  • Microsoft.VC80.CRT.manifest
  • intl

I searched the internet and there they are saying that such error may occur if there is difference of bitness of DLL. So using the command dumpbin /headers C:\path\name.dll, I began to check which DLL is 32-bit/64-bit. And at last I found the offending DLL. It's the FirebirdSql.Data.FirebirdClient which was 32-bit while the rest were 64-bit.

Now my problem is that I again searched the internet all over again for the 64-bit version of FirebirdSql.Data.FirebirdClient but could find none. All are of 32-bit.

Please advise what should I do now.

asked on Stack Overflow Jan 24, 2018 by gomesh munda • edited Jan 25, 2018 by Mark Rotteveel

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