How do I find all record:cname records that pertain to the same caonoical hostnane

[#1]

I am tryign to find all record:cname records that are related to the same canonical host name. I tried this search

'https://9.148.5.200/wapi/v1.4.1/record:cname?_max_results=-5000&_return_fields%2B=canonical,comment,...

I received an error that says

{ "Error": "AdmConProtoError: Search modifier \':\' not allowed for field: canonical",
"code": "Client.Ibap.Proto",
"text": "Search modifier \':\' not allowed for field: canonical"
}

How do I find all record:cname entries that have the same canonical name? Thanks.

[#2]

I found the error.  I had specified the query as ?canonical~:=  and it failed. I changed it to ?canonical=  and all is well.

[#3]

This solved my problem.  Thank you!