Test is a Get method arg:

Set tSc=Httprequest.Get(, 1)

Try this and compare the output to a successful request.

It's very likely your issue relates to mac, so you can also try:

Do Httprequest.InsertParam("mac", $zcvt("CC:1B:E0:E1:A6:44", "O", "URI"))

User should be not <myemail>, but your wrc login.

You can also download images from docker hub.

Is <mypassword> your actual WRC password?

You need to obtain token from here.

Got it, Thanks!

HS.SDA3.Container is a registered, not persistent object so you can't pass it between business hosts.

Pass xml stream instead.

xml from GetSDA is a stream.

GetSDA method accepts HL7 source in source variable and returns SDA stream in xml variable.

Riiight, I thought we had this discussion.

Thanks for finding it.

Does not work with dynamic object class properties unfortunately:

Class User.DO Extends %Persistent
{

Property MyProp As %DynamicObject;

/// do ##class(User.DO).Test()
ClassMethod Test()
{
    do ..%KillExtent()
    // 11 = $length({"prop":""}.%ToJSON())
    for len = 100, $$$MaxStringLength - 11, $$$MaxStringLength - 11 + 1 {
        set sc = ..Create(len)
        write "len: ", len, " result: ", $case($$$ISOK(sc), $$$YES: "OK", : "ERROR: " _ $system.Status.GetErrorText(sc)), !
        quit:$$$ISERR(sc)
    }
}

ClassMethod Create(len) As %Status
{
    set obj = ..%New()
    do obj.MyProp.%Set("prop", ..GetStream(len), "stream")
    set sc = obj.%Save()
    quit sc
}

ClassMethod GetStream(len) As %Stream.TmpCharacter
{
    set chunk = 1000000
    set stream = ##class(%Stream.TmpCharacter).%New()
    for i=1:chunk:len-chunk {
        do stream.Write($tr($j("", chunk)," ", 0))		
    }
    do stream.Write($tr($j("", len#chunk)," ", 0))
    quit stream
}

}

Results in:

len: 100 result: OK
len: 3641133 result: OK
len: 3641134 result: ERROR: ERROR #5002: ObjectScript error: <MAXSTRING>%GetSerial+1^%Library.DynamicAbstractObject.1 [%GetSerial+1^%Library.DynamicAbstractObject.1:XF]

Same issue if there are several short properties in dynamic object with total length > 3641144 characters.

We need something like:

Property MyProp As %DynamicObject(STORAGE="stream");

If I define %DynamicObject property and its serialization is longer than 3641144 characters, would that work?

Yes, well, you explicitly set your error in:

do {
$$$ASSERT(0) // Subclass Responsibility
Set tSC = $$$EnsError($$$EnsErrNotImplemented,$$$CurrentClass,$$$CurrentMethod)
} while (0)
Exit
Quit tSC
Trap
Set $ZT="",tSC=$$$EnsSystemError
Goto Exit
} 

You need to remove that.

Also Patient info should be in SDA already, so you can remove:

Set target.Patient.Name=source.GetValueAt("PID:5")
Set target.Patient.BirthGender=source.GetValueAt("PID:8")

Code block in my answer is exactly that. What error are you getting  with it?

Both can hold 3641144 at the most.

%String as defined by OP (without MAXLEN) only holds 50 characters, %VarString holds 3641144.

I moved the package to a new name 

Why?

Check the docs from @Marc Mundt, specifically Binary Contains.

import math
math.pi
>3.141592653589793

You can generate methods using Native API for Python, so technically yes.