Hallo Carsten

der Debug-Mode ist leider nicht sehr aussagekräftig - ich habe diesen einige Stunden strapaziert, um eine Lösung des Problems zu finden. Aber vielleicht siehst Du oder ein anderer Forumsteilnehmer ja etwas, was ich bisher übersehen habe:

zunächst der Debug-Ausdruck bei Fehler:
0.00: A C C E P T: Request="SUBMIT"
0.00: Metadata: Fetch application definition and shortcuts
0.00: alter session set nls_language="GERMAN"
0.00: alter session set nls_territory="GERMANY"
0.00: NLS: CSV charset=WE8MSWIN1252
0.00: ...NLS: Set Decimal separator=","
0.00: ...NLS: Set NLS Group separator="."
0.01: ...NLS: Set date format="DD.MM.RR"
0.01: ...Setting session time_zone to +01:00
0.01: Setting NLS_DATE_FORMAT to application date format: DD.MM.YYYY
0.01: ...NLS: Set date format="DD.MM.YYYY"
0.01: NLS: Language=de
0.01: Fetch session state from database
0.03: ...Check session 7315077716408109 owner
0.03: Setting NLS_DATE_FORMAT to application date format: DD.MM.YYYY
0.03: ...NLS: Set date format="DD.MM.YYYY"
0.03: ...Check for session expiration:
0.03: ...Metadata: Fetch Page, Computation, Process, and Branch
0.03: Session: Fetch session header information
0.03: ...Metadata: Fetch page attributes for application 501, page 231
0.03: ...Validate item page affinity.
0.03: ...Validate hidden_protected items.
0.03: ...Check authorization security schemes
0.03: Authorization Check: "MUST_NOT_BE_PUBLIC_USER" User: "ADMIN" Component: ""
0.03: Session State: Save form items and p_arg_values
0.03: ...Session State: Save "P231_SHOW_AKTIV_PASSIV" - saving same value: "1"
0.03: ...Session State: Save "P231_FAHRZEUG_NR" - saving same value: "3222"
0.54: Encountered unhandled exception in process type MULTI_ROW_UPDATE
0.54: Show ERROR page...
0.54: Performing rollback...

Jetzt der ohne Fehler ab der der letzten identischen Zeile bevor Unterschiede auftreten:
0.02: Authorization Check: "MUST_NOT_BE_PUBLIC_USER" User: "ADMIN" Component: ""
0.02: Session State: Save form items and p_arg_values
0.02: ...Session State: Save "P231_SHOW_AKTIV_PASSIV" - saving same value: "1"
0.03: ...Session State: Save "P231_FAHRZEUG_NR" - saving same value: "2702"
0.03: ...Session State: Saved Item "P231_KATEGORIE" New Value="KOM"
0.03: ...Session State: Save "P231_FAHRZEUG_NR_NEXT" - saving same value: "2704"
0.03: ...Session State: Save "P231_FAHRZEUG_NR_PREV" - saving same value: "1960"
0.03: ...Session State: Save "P231_FAHRZEUG_NR_COUNT" - saving same value: "3 of 11"
0.03: ...Session State: Save "P231_APS" - saving same value: "100"
0.03: Processing point: ON_SUBMIT_BEFORE_COMPUTATION
0.03: Branch point: BEFORE_COMPUTATION
0.03: ...Evaluating Branch: BEFORE_COMPUTATION type: "REDIRECT_URL" button: 4255917085448904 branch: (Unconditional)
0.03: ...Evaluating Branch: BEFORE_COMPUTATION type: "REDIRECT_URL" button: 4256000986448904 branch: (Unconditional)
0.03: Computation point: AFTER_SUBMIT
0.03: Tabs: Perform Branching for Tab Requests
0.03: Branch point: BEFORE_VALIDATION
0.03: Perform validations:
0.05: Branch point: BEFORE_PROCESSING
0.05: Processing point: AFTER_SUBMIT
0.05: ...Process "Set_NLS_DATE_FORMAT": PLSQL (AFTER_SUBMIT) BEGIN EXECUTE IMMEDIATE 'alter session set nls_date_format=''DD.MM.YYYY HH24:MI'''; END;
0.07: ...Do not run process "ApplyMRD", process point=AFTER_SUBMIT, condition type=REQUEST_EQUALS_CONDITION, when button pressed=
0.07: ...Process "ApplyMRU": MULTI_ROW_UPDATE (AFTER_SUBMIT) #OWNER#:FAHRZEUGE_HIST:FAHRZEUG_NR:GEAENDERT_AM
0.30: MRU: update "FAHRZEUGE"."FAHRZEUGE_HIST" set "FAHRZEUG_NR" = :b1, "GEAENDERT_AM" = :b2, "GUELTIG_AB" = :b3 where "FAHRZEUG_NR" = :p_pk_col and "GEAENDERT_AM" = :p_pk_col2
0.32: ...Process "P231_AZPS_setzen": SET_PREFERENCE_TO_ITEM_VALUE (AFTER_SUBMIT) P231_AZPS:P231_APS
0.32: ...Process "Reset_NLS_DATE_FORMAT": PLSQL (AFTER_SUBMIT) BEGIN EXECUTE IMMEDIATE 'alter session set nls_date_format=''&F501_NLS_DATE_FORMAT.'''; END;
0.32: Branch point: AFTER_PROCESSING
0.32: ...Evaluating Branch: AFTER_PROCESSING type: "REDIRECT_URL" button: (No Button Pressed) branch: (Unconditional)
0.32: ...Unconditional branch taken
0.01:
0.01: S H O W: application="501" page="231" workspace="" request="" session="4066683016809090"
...(Wiederaufbau der Originalseite)

Mit freundlichen Grüßen
Gerhild