How to treat ArchiveSchedu error when configuring scheduler properties for purging and archiving instance data

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The following is a summary of the information in the Business Process Manager (BPM) product documentation section Managing scheduled instance data purging and archiving:

IBM Business Monitor provides scheduled services to control recurring or scheduled execution of purging instance data from the monitor database and archiving it to a directory on your IBM Business Monitor server. You can use the data services scheduler on the WebSphere Application Server (WAS) administrative console to schedule purging and archiving instance data.

Purging and archiving instance data can be either a one-time action on the model version page on the administrative console or a scheduled service within the administrative console section, Monitor Scheduled Services.

To access Monitor Scheduled Services on the WebSphere Application Server administrative console, click Applications > Monitor Services > Monitor Scheduled Services.

To manage scheduled purging and archiving instance data on the administrative console, click Applications > Monitor Services > Monitor Scheduled Services > model_name > Scheduled Services > Purge and Archive Instance Data.

But in Business Monitor 8.5.6 and 8.5.7 environment's WAS admin console, after I go through following screen:
Monitor scheduled services > (Monitor model name) > Scheduled service > Purge and Archive Instance Data > Version > (Monitor model name) (version)

I then go to check Business Monitor server's SystemOut.log and I find the error below:

[1/17/17 20:30:57:666 CST] 00000217 ArchiveSchedu E com.ibm.wbimonitor.admin.lifecycle.archive.ArchiveSchedulerConfigController setupArchiveSchedulerConfigForm Scheduler Configuration Information is null

I asked one of our Business Monitor Product developers who gave the following explanation:

This error "Scheduler Configuration Information is null" that is logged in the SystemOut.log file is harmless.
It is only encountered once during the initialization of the Struts form related to the setup of the archive scheduler.

When applying modifications on the purge and archiving page using this navigation path:

Monitor scheduled services > (Monitor model name) > Scheduled service > Purge and Archive Instance Data > Version > (Monitor model name)(version)

then the following completion message is displayed at the top of the page in case of success

CWMAR5001I : Configuring the archive scheduler setting Completed successfully

This is the primarily information to look at to know if the operation completed well or not.

This article's information can be used for any IBM Business Monitor 8.5.* environments.