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3195282 - SAP Web Dispatcher or ICM does not start: initialization of modification subhandler failed -> cannot continue


The SAP Web Dispatcher does not start.

This can be a Standalone Web Dispatcher (an instance that only has the Web Dispatcher running), the ASCS / SCS integrated Web Dispatcher, or even the SAP HANA internal Web Dispatcher (for example, after performing HANA SID rename, the HANA webdispatcher service does not start).

At the Web Dispatcher trace file ("dev_webdisp" or "webdispatcher_hostname.xxxxx_dev_webdisp"), the following error entries (or similar) are observed:

[Thr 140612166326016] *** ERROR => IcmGetFileTimeStamp: file /path/to/file_with_rewrite_rules does not exist [icxxioutil.c 1724]
[Thr 140612166326016] *** ERROR => /path/to/file_with_rewrite_rules: Could not get info from rule file HttpModHandlerInit [http_rewrite 1000]
[Thr 140612166326016] *** ERROR => HttpISubHandlerAdd: init_func of HttpModHandler failed (-2) [http_hdl.c   481]
[Thr 140612166326016] *** ERROR => HttpParseAndAddSubHandler: HttpSubHandlerAdd failed for PREFIX=/, FILE=/path/to/file_with_rewrite_rules(rc=0) [http_plg.c   9709]
[Thr 140612166326016] *** ERROR => HttpPlugInInit: initialization of modification subhandler failed -> cannot continue [http_plg.c   1316]

The issue can also happen at the ICM process ("dev_icm" trace file) of an SAP instance from an SAP NetWeaver or ABAP platform system.



  • SAP HANA, platform edition
  • ABAP platform based system
  • SAP NetWeaver based system
  • SAP Web Dispatcher


ABAP platform all versions ; SAP HANA, platform edition all versions ; SAP NetWeaver all versions ; SAP Web Dispatcher all versions


rename, start, hdbwebdispatcher, rewrite.txt , KBA , BC-CST-WDP , Web Dispatcher , HAN-DB , SAP HANA Database , BC-CST , Client/Server Technology , HAN-LM-PLT , SAP HANA Platform Lifecycle Management , Problem

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