I complied sources 5-6 time. Hasn't any reaction. Yes, error looks like this:

USER>do b.Chapters.Insert(c1)
 
DO b.Chapters.Insert(c1)
^
<PROPERTY DOES NOT EXIST> *Chapters,Test.Book

Insert doesn't return any error. Insert worked. Thanks.  So, Problem was with compiling source?

But while run this sql in management portal I couldn't see chapters column.

select * from Test.Book 

But, I had compiled source from studio :)  Interesting.

Thank you so much.

My, isc.REST code at below. UnkownUser is enabled. I just  download Evaluation edition. Not,  production edition. So, just trial. Is it obstacle for it?

Include isc.REST
/// Class for REST-like web api.<br>
/// Logic related to request processing goes here.
Class isc.REST Extends isc.AbstractREST
{
XData UrlMap
{
<Routes>
   <!-- Test method-->
   <Route Url="/test" Method="GET" Call="Test"/>
   <Route Url="/logout" Method="GET" Call="Logout"/>
 </Routes>
}
/// End session
ClassMethod Logout() As %Status
{
#dim %session As %CSP.Session
set st = %session.Logout(1)
set %session.EndSession = 1
return st
}
/// Test method, outputs <b>%request</b>, <b>%response</b> and <b>%session</b> objects.
ClassMethod Test() As %Status
{
    write "{""Status"": ""OK""}"
    return $$$OK
}
}
 

I solved problem. But it also weird. When studio is open it returns "Service Unavailable" in browser, but when close studio it works OK.