Parse CCM 2012 log for successful TriggerSchedule

Question

Hi All,
I'm looking for a method to parse the CCM 2012 R2's UpdatesDeployment.log for:
The string Message Received
The datestamp of item 1
My powershell script kicks off the TriggerSchedule for the Software Deployment Evaluation scan and I am looking for a method to match conditions 1,2 above to determine the TriggerSchedule was successfully started.
Right now I'm using this code which doesn't seem to accurately capture the successful start or failure to start the TriggerSchedule.
I really appreciate the assistance.  I've spent hours looking up Select-String but haven't found the solution.
$trigger = "{00000000-0000-0000-0000-000000000114}"
$trigger2 = "{00000000-0000-0000-0000-000000000108}"
$scan = Invoke-WmiMethod -ComputerName $server -Namespace root\ccm -Class sms_client -Name TriggerSchedule $trigger | Select-Object ReturnValue
If($scan -ne "0"){
$result.scan = "Scan initiated"
Start-Sleep -s 180}
Else{
$result.scan = "Failed to start SCCM Update Scan"}
#Trigger Schedule 114 might not be needed and is included to increase chances of successful scan.
$scan2 = Invoke-WmiMethod -ComputerName $server -Namespace root\ccm -Class sms_client -Name TriggerSchedule $trigger2 | Select-Object ReturnValue
If($scan2 -ne "0"){
$result.scan2 = "Scan initiated"
Start-Sleep -s 180}
Else{
$result.scan2 = "Failed to start SCCM Update Scan"}#End Configuration Manager Software Deployment Evaluation scan.

Answer 1

Ok, can we put on hold the log parsing and revisit the ReturnValue from the Invoke-WMIMethod on TriggerSchedule?
If I do this:
$server = $env:COMPUTERNAME
$trigger = '{00000000-0000-0000-0000-000000000108}'
$scan = Invoke-WmiMethod -ComputerName $server -Namespace root\ccm -Class sms_client -Name TriggerSchedule $trigger
Here's what I find:
PS C:\Temp> $scan
   TypeName: System.Management.ManagementBaseObject#ROOT\ccm\__PARAMETERS
Name             MemberType Definition                     
ReturnValue      Property   uint32 ReturnValue {get;set;}
__CLASS          Property   string __CLASS {get;set;}      
__DERIVATION     Property   string[] __DERIVATION {get;set;}
__DYNASTY        Property   string __DYNASTY {get;set;}    
__GENUS          Property   int __GENUS {get;set;}         
__NAMESPACE      Property   string __NAMESPACE {get;set;}  
__PATH           Property   string __PATH {get;set;}       
__PROPERTY_COUNT Property   int __PROPERTY_COUNT {get;set;}
__RELPATH        Property   string __RELPATH {get;set;}    
__SERVER         Property   string __SERVER {get;set;}     
__SUPERCLASS     Property   string __SUPERCLASS {get;set;} 
Also:
PS C:\Temp> $scan | gm
   TypeName: Microsoft.PowerShell.Commands.MemberDefinition
Name        MemberType Definition                                                 
Equals      Method     bool Equals(System.Object obj)                             
GetHashCode Method     int GetHashCode()                                          
GetType     Method     type GetType()                                             
ToString    Method     string ToString()                                          
Definition  Property   string Definition {get;}                                   
MemberType  Property   System.Management.Automation.PSMemberTypes MemberType {get;}
Name        Property   string Name {get;}                                         
TypeName    Property   string TypeName {get;}