Hello, i'm creating a web application with PowerBuilder 2019. Everything working fine but i would like to tune it up to improve performance so i started to follow the precious advices in the appeon performance tuning guide.
I have a nvo that i've alredy optimized its code, but it's still quite slow so i would like to understand how to speed up its execution over wan. It contains multiple statements that result in server calls so i guess it would be a good pratice to partition it server-side.
Following the manual i should do something like this

n_order ln_order
long ll_rc
dw_1.Retrieve()
dw_1.SetSort("#1 A, #2 D")
dw_1.Sort()
ll_rc = myconnect.CreateInstance(ln_order, "PB_pkg_1/n_order")
if ll_rc = 0 then
ln_order.of_UpdateOrderPrice(arg_orderid)
end if

but i'm not sure if it is the right approach on my environment and how to define the myconnect object
and probably i am missing something:

long ll_rc
uos_gendoc_web u_genera
connection myconnect
myconnect = create connection  
myconnect.connectstring= "ConnectString='DSN=startdb;UID=dba;PWD=sql',DelimitIdentifier='Yes';EnabledLocalDB='false'"

ll_rc = myconnect.ConnectToServer()
IF ll_rc <> 0 THEN  
    MessageBox("Connection failed", ll_rc)  
END IF
ll_rc = myconnect.CreateInstance(u_genera, "PB_pkg_1/u_genera")
IF IsValid(u_genera) = FALSE THEN   
    Messagebox('','create instance failed')  
End if
if ll_rc = 0 then
    ll_ret = u_genera.wf_genera_doc(str_doc)    
end if

i don't get a connection failed, but it looks like the createinstance fails since i get an error 10014
this is the AppeonServerLog:

873:3 [20-01-24 10:01:08] [AXDispatcher (GetHeader)] Header-pt:0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0
873:3 [20-01-24 10:01:08] Header-protocolMode:
873:0 [20-01-24 10:01:08] [JRouterImpl (Call())] returnObject=ReturnObject [ Code=10014, Message=Internal error. Please contact the system administrator., Exception=, ReturnValue= ]
875:3 [20-01-24 10:01:08] [AXDispatcher (doPost)]
875:3 [20-01-24 10:01:08] =======================INVOKE FINISHED==========================================
875:3 [20-01-24 10:01:08] Input time < 15ms; Process and output time < 15ms; Total time < 15ms.
875:3 [20-01-24 10:01:08] ================================================================================

any ideas?
tia,

simone