Requests Stuck with Inactive No Manager - Routine AFPESA Cannot Construct the Name of an Executable File

All the Concurrent Requests are showing up with Phase Inactive and Status No Manager.
The Standard Manager is not able to process any request because each manager process dies immediately after starting up. The log file of the manager process shows the following error:

List of errors encountered:
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_ 1 _Routine AFPESA cannot construct the name of an executable file foryour concurrent request 2181143.

Check that the file name components are correct and valid on yoursystem. Check that the environment for the person who started the conc
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The problem typically occurs on a cloned environment that has been created.

Cause

The problem is due to an incorrect environment setup. The custom PROD_TOP is not defined in the environment files.
Solution

Any custom product_top needs to be defined correctly in the Context File. The following extract describes how to add a custom product_top to the Context File by using Oracle Applications Manager:

Creating a customer owned AutoConfig template file
You can create an AutoConfig template file of your own. This will enable you to develop custom applications that AutoConfig configures and maintains.
Perform the following tasks in the order listed:

Define a product_top
Use the Oracle Applications Manager Context Editor to add your custom product_top to the context file. Refer to the Help pages available on your Oracle Applications Manager site. The relevant information for adding custom context variables is located in the "System Configuration" -> "AutoConfig" -> "Custom Parameters" section. Choose the variable type "PRODUCT_TOP" when adding the product_top variable.

For example, define "MY_TOP" as your product_top as follows:

OA_VAR = MY_TOP
Default Value = %s_at%/my/11.5.0
Title = My Product top
Description = This is my product top
OA_TYPE = PROD_TOP

Note: You must have Oracle Applications Manager (OAM) H or higher installed to manage custom variables. Refer to Oracle Applications Manager 11i Availability for instructions on installing OAM.
AutoConfig needs be run after adding the custom product_top to the Context File.
Alternatively, a product_top can added manually to the environment file instead of defining it in the Context File.