Multiple versions of dotConnect in productive Environment

[romanFleischer]

Hello,

we serve several web applications on one windows server. The older applications were developed with .NET 3.5 and dotConnect version 5.40. No changes are necessary.

The new applications were developed under .NET 4.0 (with new entity framework) and therefore the dotConnect version 5.70

If we try to serve both - we get the following error

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Could not load file or assembly 'Devart.Data.Oracle, Version=5.35.79.0, Culture=neutral, PublicKeyToken=09af7300eec23701' or one of its dependencies

What goes wrong? All new dlls are in the bin directory of the web application. Is it possible to use both dotConnect versions, or do we have to install the new version?

Do the older applications work also with the new dotConnect version? This means are the versions downward compatible?

Thanks in advance
Roman

[StanislavK]

The problem may be that assemblies from the GAC are used instead of the ones placed to the Bin folder of the site (e.g., if the old version is installed on the deployment server). Please perform the following:
1) ensure that the assemblies deployed in the Bin folder are of the proper version, i.e., 5.70.* for Devart.Data.Oracle and 5.0.93 to 5.0.143 (the exact version depends on the build number) for Devart.Data;
2) delete all policy.*.Devart.* files from the GAC;
3) check that the references set in the project lead to the Bin folder, not to the GAC, and set their 'Specific Version' property to true.

Please tell us if this helps.

[romanFleischer]

We tried to make the described changes - now we get another error when we try to create an array of types included in Davart.Data.Oracle library.
System.ArrayTypeMismatchException

But the code is simple, and works with version 5.70.

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var paramProfession = professionId.CreateOracleParameter("profession", OracleDbType.Integer);
List parameters = new List { paramProfession};

These are the settings we use in web.config

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Any idea?
Thanks
Roman

[StanislavK]

Could you please check under debug what versions of the Devart.Data and Devart.Data.Oracle assemblies are actually loaded for both applications? The correct versions should be:
1) Old assemblies: 5.0.40 for Devart.Data and 5.35.79 for Devart.Data.Oracle
2) Newer assemblies: 5.0.105 for Devart.Data and 5.70.152 for Devart.Data.Oracle.