Solution : https://service.sap.com/sap/support/notes/854044 (SAP Service marketplace login required)
Key words :
'error''frontend unavailable''waiting, terms front-end printing, front-end printing, attached correction instructions, trace file dev_printtrace, program error, file dev_printtrace, trace function, dev_printtrace reason, spool requests
Related Notes :
| 864474 | Ignoring unknown GUI logon data |
| 821519 | Front-end printing with control technology |
| 19466 | Downloading SAP kernel patches |