==== 3.4.2. Enable a custom stored procedure ====

Every custom stored procedure related to Produmex WMS should be called from the PMX_TransactionNotification stored procedure as this stored procedure is executed from all Produmex WMS flows and processes when creating or modifying a document. 

The SBO_SP_TransactionNotification is only called when creating or modifying a standard SAP document.

**1.** Open the custom stored procedure.

In this example: PMX_SP_OECTransactionNotification. 

{{:implementation:5.2.1.png?nolink|Enable a custom stored procedure}}

**2.** Select the commented text and copy it to the clipboard (Ctrl+C). 

**3.** Open the PMX_SP_TransactionNotification for modification.

**4.** Paste the text to the PMX_SP_TransactionNotification (Ctrl+V) and uncomment it.\\

Note: If you have an older custom stored procedure, the header of the commented text may say that you should add it to the SBO_SP_TransactionNotification, but it should be added to the PMX_SP_TransactionNotification in this case as well.

**5.** Alter the PMX_SP_TransactionNotification with this modification.\\

=== Stored procedure call hierarchy ===

{{:implementation:wms:fancy_flowchart.png?nolink|Stored procedure call hierarchy}}