IBM Support

All Cognos PDF reports render blank

Troubleshooting


Problem

Every report ran to PDF format shows as blank.  This happens in Edge, Chrome and Firefox browsers

 

Symptom

PDF reports render blank

Cause

Missing a new required MIME type:

.mjs : application/javascript

Environment

11.2.4 FP5/12.0.4 and beyond (where IIS script has been updated to include this new MIME type)
IIS set up using CA_IIS_Config.bat script

Diagnosing The Problem

Capture a browser network trace while replicating the issue.
https://www.ibm.com/support/pages/how-run-browser-network-trace-and-save-har-file
The trace file will show a http 404 not found error on the following requests.

GET /ibmcognos/bi/pdf.js/build/pdf.mjs?

GET /ibmcognos/bi/pdf.js/web/viewer.mjs?

Resolving The Problem

In IIS select the virtual directory (ibmcognos if using the default) and double-click Mime Types.

Add the following mime types to your IIS configuration if they are not already present.

  • .svg : image/svg+xml
  • .woff : application/x-font-woff
  • .json : application/json
  • .woff2 : font/woff2
  • .template : text/html
  • .txt : text/plain
  • .properties : text/plain
  • .wasm : application/wasm
  • .mjs : application/javascript

Restart IIS

Document Location

Worldwide

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSTSF6","label":"IBM Cognos Analytics"},"Component":["Gateway\/Web Server"],"ARM Category":[{"code":"a8m50000000Cl6dAAC","label":"Gateway\/Web Server"}],"ARM Case Number":"TS017879023","Line of Business":{"code":"LOB76","label":"Data Platform"}},{"Product":{"code":"SS6G84","label":"IBM Cognos Analytics on Cloud"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":" ","Platform":[{"code":"","label":""}],"Version":"","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}},{"Product":{"code":"SSLKT6","label":"IBM Maximo Asset Management"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":" ","Platform":[{"code":"","label":""}],"Version":"","Edition":"","Line of Business":{"code":"LOB77","label":"Automation Platform"}}]

Document Information

Modified date:
15 January 2026

UID

ibm17176858

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