Solution : https://service.sap.com/sap/support/notes/635317 (SAP Service marketplace login required)
Key words :
IPC administrator, parameters.xml, multiple TTE customizing clients
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677456 | SAPKU40003: Support Package 03 for CRM 4.0 |
653514 | TTE: Migration from CRM 3.0 to 4.0 |
638483 | Configuring TTE for External Tax Systems for USA or Canada |
637847 |