SMS_MP_CONTROL_MANAGER Warnings 5416 & 5418

After extending the sms_def.mof and configuration.mof I noticed a large amount of 5416 and 5418 warnings in the SMS_MP_CONTROL_MANAGER with the text:

"MP could not find some class or property definitions when processing Hinv as they are apparently missing in sms_def.mof. Unknown classes and properties have been ignored and a MIF file generated with all the classes and properties that could be found.

Possible cause: This might indicate that the report has become obsolete due to a new HW inventory policy or that a customer's private definitions haven't been properly propagated to the sms_def.mof at the PSS.
Solution: See if the missing classes or properties are genuinely missing in the current sms_def.mof and find out why the client put them in the xml report."

Uh-oh!

So, I had to find out what was going on here, obviously something related to the changes made.
I had a look at DATALDR.LOG on the primary site, no errors there to speak of.

Checked out MP_HINV.LOG and found quite a few warnings..

"Hinv: property name not found in the mapping table: KeyName"

So looks like theres a problem with KeyName.

Comparing the sms_def to the configuration mof files I saw the problem:
sms_def.mof
#pragma namespace ("\\\\.\\root\\cimv2\\SMS")
#pragma deleteclass("ProvisioningMode", NOFAIL)
[SMS_Report(TRUE),SMS_Group_Name("ProvisioningMode"),SMS_Class_ID("HEALTH|ProvisioningMode|1.0")]
Class ProvisioningMode: SMS_Class_Template
{
[SMS_Report(TRUE)] String ProvisioningMode;
};

configuration.mof
#pragma namespace ("\\\\.\\root\\cimv2")
#pragma deleteclass("ProvisioningMode", NOFAIL)
[DYNPROPS]
Class ProvisioningMode
{
[key] string KeyName;
String ProvisioningMode;
};
[DYNPROPS]
Instance of ProvisioningMode
{
keyname="SystemCenter.fr";
[PropertyContext("Local|HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\CCM\\CcmExec|ProvisioningMode"),Dynamic,Provider("RegPropProv")] ProvisioningMode;
};


See the problem? I had forgotten to add KeyName to the sms_def.mof, meaning it couldnt map this, in turn causing my warnings.

Added the missing line to sms_def ([SMS_Report(TRUE),key] string KeyName;) and the problem has now been resolved. No more warnings, and MP_HINV is processing inventory data very happily.

Sweet deal!