>>367 エラーログはこんなでした。
cupsdReadClient: 18 1.1 CUPS-Get-Default 1
CUPS-Get-Default
CUPS-Get-Default client-error-not-found: No default printer.
Returning IPP client-error-not-found for CUPS-Get-Default (no URI) from localhost
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cupsdReadClient: 18 1.1 Get-Subscriptions 1
Get-Subscriptions ipp://localhost/
Get-Subscriptions client-error-not-found: サブスクリプションが見つかりません。
Returning IPP client-error-not-found for Get-Subscriptions (ipp://localhost/) from localhost
--------------------------------------------
[Job 1] Started filter gs (PID 621)
[Job 1] Started filter pstops (PID 622)
[Job 1] Unable to execute gs program: No such file or directory
[Job 1] PID 621 (gs) stopped with status 1!
[Job 1] The print file is empty.
[Job 1] PID 622 (pstops) stopped with status 1!
[Job 1] /usr/lib/cups/filter/NEC_MultiWriter_5750C/NCM_PS2PM: line 37: /usr/bin/gs: No such file or directory
--------------------------------------------
PID 704 (/usr/lib/cups/cgi-bin/admin.cgi) exited with no errors.
[CGI] admin.cgi started...
cupsdAcceptClient: 16 from localhost (Domain)
[CGI] http=0xb8207660
[CGI] cgiSetVariable: SECTION="admin"
(中略)
[CGI] cgiSetVariable: MAX_JOBS="500"
[CGI] cgiSetVariable: MAX_LOG_SIZE="1m"
[CGI] /usr/share/cups/drivers/pscript5.dll: No such file or directory

/usr/bin/gsはありましたが、pscript5.dllはありませんでした。