Delivery Confirmation dock Error

First problem: Error: no valid serial number is assigned for the document category
Solution: solution: Note: if the document category was not defined correctly, there is a good chance that document sequences and sequence assignments were not defined correctly either. in this case, user will only encounter a new warning message at ship confirm, such as "A valid sequence assignment does not exist", and the shipping document will still not be printed. perform the following steps to set up the document sequence and the sequence assignments correctly:

A. Define Document Sequence:
1. Navigate to shipping-> setup-> documents-> document sequences
2 Click on the Search icon, and limit your search to '% Shipping Execution %
3 All of the sequences valid for shipping execution are displayed
4 Check to see if there is an existing sequence meeting the following criteria:
4.1 There is no end date, or the end date is a future date (the sequence becomes invalid when the end date is reached)
4.2 Type is Automatic
4.3 Initial Value is what you want for the first Bill of lading to have as its Bill of Lading number
5 If none of the existing sequences meet these criteria, create a new sequence which does meet your criteria by clicking on the New icon

B. Define a document sequence assignment:
1 Navigate to shipping> setup-> documents-> assign sequences
1.1 This is the form where you assign a specific sequence to a specific shipping report.
1.2 If you found an existing document sequence in step A which meets your criteria,
1.2.1 Search for application shipping transactions
1.2.2 In the list returned, find a sequence which refers to category BOL (which you verified or created in the main section of this note)
1.2.3 Select that sequence, and click on the Assignment tab
1.2.4 In the assignment window, verify:
1.2.4.1 The sequence assignment you selected references the document sequence you verified or created in step
1.2.4.2 There is no end date, or if there is an end date, it is a date significantly in the future
(The sequence assignment becomes invalid when this end date is reached)
2 If you created a new sequence in step A, or if you did not find a usable sequence assignment in step 1.2 click on the new button and create a new sequence assignment. which meets the criteria defined in step 1.2.4

3. Retest your issue: Ship confirm any delivery using the document set "Ship Confirm Documents", and verify:
3.1 You do not encounter the error message "A valid document category does not exist"
3.2 A Bill of Lading report is generated for the delivery, and it has the BOL number specified as the initial value in the document sequence (step)
When defining document sequence and allocation, the shipping management system must have the BOL, MBOL, and PKSLP, assign the sequence, and select the ledger.

If the second error occurs: Unexpected error: WSH_NEW_DELIVERY_ACTIONS.setInTransit error, Oracle error--29280
ORA-29280: Invalid directory path
ORA-06512: In "SYS. UTL_FILE", line 41
ORA-06512: In "SYS. UTL_FILE", line 478
ORA-06512: In "APPS. ADS_UTIL_PKG", line 22
ORA-06512: In "APPS. ADS_WSH_DELIVERY_DET_TRG1", line 67
ORA-01403: No data found
ORA-04088: trigger 'apps. ADS_WSH_DELIVERY_DET_TRG1 'error during execution
The solution is to cancel the 'apps. ADS_WSH_DELIVERY_DET_TRG1 'trigger:
1. log on to SQLPLUS using the apps account
2. SQL> alter trigger

ADS_WSH_DELIVERY_DET_TRG1 disable;
3. test again.