Solution : https://service.sap.com/sap/support/notes/121998 (SAP Service marketplace login required)
Key words :
remote connection including logon data, system variable sy-xprog, abap language element wait, rfc short dump call_function_wait_error, rfc logon data, sap basis system, remote function calls, abap runtime errors, abap dump analysis', abap/4 dump analysis
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| 420741 | Short dump CALL_FUNCTION_WAIT_ERROR "*áêê*" |
| 417514 | ABAP-WAIT does not return |
| 199840 | POS IDoc inbound dispatcher with locking control |
| 176740 | CALL_FUNCTION_WAIT_ERROR within listing |
| 19466 | Downloading SAP kernel patches |