Hi Team,

Greetings for the day.

Getting the below error,please let me know the update/solution for this error.

Details:

Module was unable to convert parameter to a double value
Original parameter: '$Data/Property[@Name='FreeSpaceMB']$'
Parameter after $Data replacement: ''
Error: 0x80020005
Details: Type mismatch.
One or more workflows were affected by this.
Workflow name: Microsoft.SQLServer.2008.DBFile.SpaceFreeMegabytes.Collection
Instance name: DTPlat_Stg_Code
Instance ID: {107777CB-B70A-075F-4F60-388F798DDD8C}
Management group: SNA

Thanks.

Regards,

Subhani Shaik

May be you need update your SQL MP to its latest version

pl. chk this article

https://social.technet.microsoft.com/Forums/systemcenter/en-US/d2a4fff0-038e-4970-9eff-d1fa48c94a34/sql-server-mp-6400-operations-manager-failed-to-convert-performance-data

1) Please refer to DAN Myhre's Blog:
https://danmyhre.wordpress.com/2012/12/18/generic-performance-mapper-module-failed-execution/
Cause
This is caused by a known issue with Windows Server 2008 R2 (Pre-SP1) that causes WMI to leak memory.
Solution
Install either SP1 on the server, or apply the following patch.  Unfortunately this requires a reboot.

2) You may try to refer to Faizan suggestion, update SQL Mp into most updated version,http://www.microsoft.com/en-us/download/details.aspx?id=10631 . However, i does not think that this is must help in solving your issue except your present MP version is 6.3.173.0 or below.
https://social.technet.microsoft.com/Forums/systemcenter/en-US/d2a4fff0-038e-4970-9eff-d1fa48c94a34/sql-server-mp-6400-operations-manager-failed-to-convert-performance-data
The above post is solving the bug of  CPU Utilization Monitor but you issue is about DB file Free Space.
Roger