How To Fix IS171 - Incorrect selection of parameters for locking serial numbers

SAP Error Message - Details

• Message type: E = Error

• Message class: IS - Equipment management

• Message number: 171

• Message text: Incorrect selection of parameters for locking serial numbers

What causes this issue?

Incorrect selection of parameters for locking serial numbers. You can
distinguish between three different lock types:

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

<ZH>Single record lock</>
This lock type is <ZH>extremely</> time intensive, but the
disadvantages of the collective lock and the lock of all serial numbers
do not apply.
<ZH>Collective lock</>
The locks are collected after the import and transmitted as a whole to
the enqueue server. Processing can be accelerated by reducing
communication operations at the enqueue server. The problem with this
is that serial numbers that are already locked (possibly by other
users) terminate the whole process. The system cannot determine which
serial numbers were decisive for this. You have to restart the program.
<ZH>Lock of all serial numbers</>
This is the quickest procedure and is strongly recommended if there are
mass data changes. The problem with this is that nobody can change or
use serial numbers online. All serial numbers are locked until the
execution of the program has been completed.

System Response

How to fix this error?

Consider carefully which alternative you should use:
<ZH>First alternative</>
If your system is frequently overloaded by other users' dialog locks,
you should choose the first alternative. You should remember that this
invloves long runtimes. The advantage of this is that the serial
numbers that are locked by other users are collected and the program is
able to continue processing. The serial numbers that are already locked
have to be processed again in a new program run.
<ZH>Second alternative</>
The second alternative provides a faster processing option than the
first alternative. The disadvantage is that if a serial number has
already been locked, this will terminate the complete program run.
<ZH>Third alternative</>
If you wish to perform mass data changes, you should choose the third
alternative.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IS171 - Incorrect selection of parameters for locking serial numbers ?

  The SAP error message IS171, which states "Incorrect selection of parameters for locking serial numbers," typically occurs in the context of handling serial numbers in inventory management or production processes. This error indicates that there is an issue with the parameters set for locking serial numbers, which can affect the ability to manage inventory accurately.
  Cause:
  The error can arise due to several reasons, including:
  
  Incorrect Parameter Settings: The parameters defined for locking serial numbers may not align with the requirements of the transaction being performed.
  Missing Serial Number Assignment: The serial numbers may not be properly assigned to the materials or may not exist in the system.
  Inconsistent Data: There may be inconsistencies in the data related to the serial numbers, such as missing or incorrect entries in the database.
  Transaction Type Issues: The transaction type being used may not support the locking of serial numbers, or it may require specific conditions to be met.
  
  Solution:
  To resolve the IS171 error, you can take the following steps:
  
  Check Parameter Settings: Review the settings for serial number management in the relevant configuration. Ensure that the parameters for locking serial numbers are correctly defined.
  Verify Serial Number Assignment: Ensure that the serial numbers are correctly assigned to the materials involved in the transaction. You can check this in the material master or inventory management screens.
  Data Consistency Check: Run consistency checks on the serial number data to identify any discrepancies. This can often be done through transaction codes like MM02 (Change Material) or IQ01 (Create Serial Number).
  Review Transaction Type: Ensure that the transaction type you are using supports the locking of serial numbers. If necessary, consult the documentation or SAP support for guidance on the specific transaction.
  Consult SAP Notes: Check the SAP Support Portal for any relevant notes or updates that may address this specific error. There may be patches or updates that resolve known issues related to serial number locking.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as IQ01, IQ02, IQ03 for managing serial numbers, and MM01, MM02, MM03 for material master data.
  SAP Documentation: Review the SAP Help Portal for documentation on serial number management and inventory processes.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a technical consultant who can provide more in-depth analysis and assistance.