To use Crystal Reports in the Windows GUI, Web GUI or Indicium application tier, the Crystal Reports drivers must be installed on the client or web server. This concerns Crystal Reports Runtime 13 with service pack 21 or up for the right OS. With both, the support for the ASP.NET Web components must be installed.
The latest Crystal Reports Runtime Engine (32/64 Bit) can be downloaded here or using these direct links to version 13.0.25:
For the Web GUI, the Crystal Reports installation creates a new directory to IIS with the name
aspnet_client. This directory contains
deployed in the IIS default website, then the
aspnet_client directory can be copied to the corresponding website.
If the browser in which the preview is opened cannot access the
aspnet_client folder, then a blank preview dialogue will open.
The unsuccessful request and what this refers to can be traced in the Network tab of the browsers Developer Tools (F12).
The unsuccessful request is colored red and refers to
Check on the web server why this request gives no result. The folder within
aspnet_client\system_web possibly contains an
incorrect version number and may have to be renamed.
If the report file is stored on a network location, then UNC paths must be used. For example:
Versions of the Thinkwise Windows and Web user interfaces before 2019.2.15, the Indicium application tier before 2019.2.5 and the Thinkwise Reporting service before 4.0 require service pack 21 of the Crystal Reports Runtime Engine, due to Crystal Reports compatibility issues.