Splunk add quotes when passing searches stored in a lookup table to the datamodel search using map?

[BacPhan-2005]

According to https://community.splunk.com/t5/Splunk-Search/Is-there-a-way-to-instruct-Splunk-to-not-add-quotes-wh... I have try to do the same thing with data model search but I have encountered to error that unable to query .... 

| inputlookup internalcheck.csv
| fields check
| map maxsearches=100 search="$check$"

However search with raw SPL will not be invalid 

search="| tstats count from datamodel=Endpoint.Registry ..."

 Can I have some solutions about doing multiple search queries from data model?

[PickleRick]

Are you absolutely sure about the contents of your csv? The error message suggests you have extra single quotes. That would effectively make your search not 

| tstats something something

but 

'| tstats something something'