### Symptom

- You receive the error below in Process Integration (PI) transaction SXMB_MONI during message processing:
- SECURITY_APPLY_ERROR Communication error SRT: Unsupported xstream found: HTTP Code 401 : Unauthorized

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### Environment

- PI Release Independent
- SAP NetWeaver
- SAP Process Integration

### Product

SAP NetWeaver all versions ; SAP Process Integration all versions

### Keywords

PI, XI, SXI_MONITOR, sign and encrypt, Call Adapter, profile, outbound, channel, Process Integration 7.0, PI 7.0, PI 7.01, PI 7.02, Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31, Process Orchestration 7.4, PI 7.4, PO 7.4, Process Orchestration 7.5, PI 7.5, PO 7.5, NetWeaver, authorization, SM21 , KBA , BC-XI-IS , Integration Server , Problem

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