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ODBC connnection call fails

ODBC connnection call fails

ODBC connnection call fails

I have tested the ODBC DSN and it works but the following code statement fails with error: ODBC - call failed:


Dim Conn As Connection
Set Conn = wsODBC.OpenConnection("Conn1", , , "ODBC;DSN=IBSMSbloem;") 

What can be the problem?


PK Odendaal

RE: ODBC connnection call fails

Not enough information. Did you define it as a 64-bit DSN?

In any case DSNs are generally a bad idea, especially system DSNs. Just put the details into the connection string instead.

RE: ODBC connnection call fails

Thanks for your reply, which I always regard highly.
I do not know how to establish whether it is a 32 or 64 bit DSN and what it should be. I am using vb6 with MySQL.
How would I specify the DSN in the connection object if it is not registered under the System DSN? If you could help me getting the connection string right I will appreciate.

RE: ODBC connnection call fails

It is a 64 bit driver.

RE: ODBC connnection call fails

I could not get the 64 bit drivers to work. I installed an older 5.3 32 bit driver and that works. The connector string that I use is


strConnect = "Driver={MySQL ODBC 5.3 ANSI Driver};Server=YourServerIP;Port=3306;Database=YourDatabase;User=YourUserName;Password=YourUserPass;Option=3; 

David Paulson

RE: ODBC connnection call fails

Hi David,
I think you are right and thanks so much for the tip.

I found this excellent link for installing and registering the myodbc5a.dll file (for ANSI)in the correct folder:

I did register it - see attachment 01, but I am still unable to use the 32 bit driver due to error code 193.
This link explains error code 193, but I seem unable to solve the error: (see attachment on next message)

Any further help will be appreciated.

RE: ODBC connnection call fails

What OS are you using? I don't set up a system DSN, As long as the driver is listed in the ODBC Data Source administrator (32 bit) you can use it.
Just substitute your information in the connection string and it should work.


Public Conn As Connection
Public strConnect as string
Set Conn = New Connection
Conn.CursorLocation = adUseClient
strConnect = "Driver={MySQL ODBC 5.3 ANSI Driver};Server=YourServerIP;Port=3306;Database=YourDatabase;User=YourUserName;Password=YourUserPass;Option=3;"
Conn.Open strConnect 

David Paulson

RE: ODBC connnection call fails

Hi David,
I am on Windows 7
I think you are using VB.NET or ADO. I am trying to use DAO.
Kind regards.

RE: ODBC connnection call fails

I'm on Win 10, but I have machines on Win 7 , and xp accessing the same Mysql database. I am using VB6 and ADO.

David Paulson

RE: ODBC connnection call fails

You must define the DSN using the 32-bit ODBC Administrator. On a 64-bit system people often run the 64-bit tool instead. That results in a DSN that 32-bit applications can't use because it is in the wrong format and points to a 64-bit ODBC Driver.

ODBC Administrator tool displays both the 32-bit and the 64-bit user DSNs in a 64-bit version of Windows

Quote (Microsoft)

To work around this problem, use the appropriate version of the ODBC Administrator tool. If you build and then run an application as a 32-bit application on a 64-bit operating system, you must create the ODBC data source by using the ODBC Administrator tool in %windir%\SysWOW64\odbcad32.exe. To indicate the type of DSN, you can add "_32" to the 32-bit user DSNs and "_64" to the 64-bit user DSNs.

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