Troubleshooting
Problem
You are installing a local file definition and receive message DFHAM4803. The message indicates the install failed because the deletion of an existing definition failed. However, you are unable to find a duplicate definition within a File Control Table (FCT) or as a Resource Definition Online (RDO) definition in your CICS Transaction Server for z/OS (CICS TS) region.
Symptom
DFHAM4803 Install failed because an existing definition for file filename could not be deleted.
Cause
A file resource definition named ABCD (for example) was found that included options REMOTESYSTEM=SYSID and REMOTENAME=ABCD. However, SYSID was coded equal to a region that had file ABCD defined as local. This caused the remote file to be installed as a local file and message DFHAM4803 to be issued validly due to a duplicate definition. In this case, it was found that the SYSID had been entered as a typo.
Resolving The Problem
Fix the remote file resource definition so that it is no longer defined with a REMOTESYSTEM equal to a SYSID of a region that has the file defined locally.
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Product Synonym
CICS/TS CICS TS CICS Transaction Server
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Document Information
Modified date:
05 January 2026
UID
swg21159367