Error 1046: This Version of Citrix Receiver does not support the selected encryption

When starting a ICA session with RES VDX enabled you may receive the error message:

Error: This Version of Citrix Receiver does not support the selected encryption, when starting RES VDX session

After some searching I ended up at the RES support site which tells you:

Q203290 Error: This Version of Citrix Receiver does not support the selected encryption, when starting RES VDX session

When starting a Citrix XenApp session with RES VDX enabled the following error might occur:
“This Version of Citrix Receiver does not support the selected encryption. [Error 1046] The Virtual Driver is not loaded”.
The second logon attempt runs without any problems. This issue only occurs when using the Citrix Receiver. When using earlier ICA client versions , this error will not occur.

Cause 1 РRES VDX tries to initialize the ICA virtual channel when the Citrix Receiver is not ready yet. 95% probability.
In Citrix Receiver 3.0 and higher, Citrix implemented a timeout in their software. Due to this timeout an error is generated by the Citrix Receiver when RES VDX tries to open the ICA virtual channel. At the seccond logon attempt the timeout is expired and the logon process continues without any problems.
Solution 1.1 – Solved in a FixPack based on RES VDX SR2

To request the fixpack please consult RES Support

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