Open in Server fails using QlikView Desktop May 2023 or later against earlier version of QlikView Server

[Chip_Matejowsky]

Using Open in Server in QlikView Desktop to connect to a QlikView server fails with: 

Connected to server OK, No reply received
Switching to HTTPS tunnelling
Connected to server OK, Security settings denies access
Switching to HTTP tunnelling
Connected to server OK, No reply received

The Desktop client is running version May 2023 (12.80) or later, while the QlikView server is a previous version, such as May 2022 (12.70).  

Resolution

If QlikView Desktop and QlikView Server are running different versions, either upgrade the lower version to match the higher version or set the correct and same session algorithm in the Settings.ini file to resolve the discrepancy.

For issues where the QlikView Desktop is running version May 2023 (12.80) and the QlikView Server is running version May 2022 (12.70) or earlier, the QlikView Desktop settings.ini file must contain the entry SessionAlgorithm=CALG_AES_128.

Modify the QlikView desktop client settings.ini to add SessionAlgorithm=CALG_AES_128. For information on how to modify the settings.ini, see: How to change the settings.ini in QlikView Desktop and QlikView. 

Cause

The discrepancy in the session algorithm causes the error. QlikView May 2023 (12.80) now uses AES256 encryption instead of AES128, which was used in QlikView May 2022 (12.70) and earlier. 

Related Content 

What's New in QlikView May 2023?
QlikView 12.80: set a different Session Algorithm for QVP communication
Communication to QlikView server fails: Switching to HTTPS tunneling 
QlikView Client connection fails with Connected server OK, negotiations timed out Switching to HTTP ... 

Internal Investigation ID(s)

QV-24861

Environment

QlikView 

[josemanzod]

Thank you, Very useful.

[alexqin]

what if my desktop version is 12.2 and the version on the server is 12.8?

which file should I modify?

[p_verkooijen]

@alexqin Then you will have to update the Desktop version to 12.8

[Johannes_Becker]

Hi,

we have 12.8 on both Server and Desktop. This worked until very recently. Now we're getting the above error.

Any ideas?

Cheers,
Hannes

[Chip_Matejowsky]

@Johannes_Becker,

Since both QlikView Server and QlikView Desktop are version 12.80, it is not likely due to the encryption discrepancy between 12.80 and earlier versions listed in this article. 

Suggest you refer to article QlikView Troubleshooting License Lease issues, and ensure port 4747 open on the computer running QlikView Desktop.

Best Regards