Problem
When running the Web Viewer installer, the installation program quits immediately without leaving a log file. Error message mentions "error 1603".
Version 5.0 or earlier is installed.
Background 32-bit installer
Prior to version 4.2.2 Signifikant requires to be run in 32-bit mode in IIS. From version 4.2.2 Signifikant can run in 64-bit mode, but installer still requires 32-bit mode.
Error 1603 can occur when the (default) app pool of IIS does not allow 32-bits applications.
Solution
To solve this, please open IIS Manager, right-click on the default app pool in the "Connections" pane and select "Advanced settings". Then change "Enable 32-bits applications" to True and try to install the Web Viewer again (run as administrator).
If you run version 4.2.2 or later, it is possible to set "Enable 32-bits applications" to False again after installation is completed to enable application to run in 64-bit mode.
Background Default Web Site definition
Error 1603 can also occur when the Default Web Site bindings is only to https and not to http. The installer assumes a port 80 (http) binding is available. If not, the installer will abort and the installation is rolled back.
Furthermore, the default site is found on index 1, not by its name. If more then one site is defined, the index order may be changed and the Default Web Site has got a new index number.
Solution
To solve this, please open IIS Manager, select the Default Web Site and edit Bindings. Ensure that a binding with type http is defined, for port 80.
Also select the Sites node and ensure that the Id is 1 for Default Web Site .
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