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#1 Posted : Monday, January 7, 2013 3:48:12 AM(UTC)

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Posts: 17


We are running a client application that has been converted to .net 4.0, and that application calls to a conversion.dll (net 4.0), which loads and initializes the LeadTools 14.5 dll’s. The intent is to use the Raster Conversion process for images files. (jpg’s). Each time the conversion.dll (net 4.0), attempts to load the LeadTools 14.5 dll’s , the below error message is thrown by the conversion.dll.
“Mixed mode assembly is built against version 'v1.1.4322' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.”

We have attempted to correct the issue with a few app.config entries, but these entries made no change to the outcome.

Sample entry:

Can the LeadTools 14.5 version be used in a .net 4.0 application?

Try the latest version of LEADTOOLS for free for 60 days by downloading the evaluation: https://www.leadtools.com/downloads

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#2 Posted : Monday, January 7, 2013 3:50:11 AM(UTC)

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Posts: 17

The sample entry somehow got chopped off (may be because it had some code). Retrying:

<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
<supportedRuntime version="v1.1.4322" />
#3 Posted : Monday, January 7, 2013 5:24:29 AM(UTC)


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Posts: 256

LEADTOOLS v14.5 went out of production long before .NET 4.0 came out. I can see that you are still using .NET 1.1.

Please note that all these old DLLs were 32-bit only, so make sure your application's target CPU is set to x86.

Also, in the old v14.5 of LEADTOOLS, there were assemblies for .NET 2.0, so could try to modify your application to use them.

If that doesn't solve it, try to search Microsoft documentation to see if it's possible to use an old Mixed-mode assembly with .NET 4.0.

If you can't find such a solution, download the free evaluation of LEADTOOLS 17.5, which has .NET 4 assemblies (for both 32-bit and 64-bit) that contain almost all features of old v14.5 (and many more). You can then decide if you'd like to upgrade your application to use the new version.

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