NAV 2016 error when read multiple rows from webservice from NAV

hollydonut

hi all experts,


i have create a codeunit to read a webservice from nav based on http://vjeko.com/web-services-black-belt-consuming-nav-web-services-using-pure-cal/
but some times i got an error "A call to System.Reflection.RuntimeMethodInfo.Invoke failed with this message: The operation has timed out"

below is the debuger result, it stop when run the READMULTIPLE Function



to be exact on below part



theese are the global variables :
Name DataType Subtype
Entities DotNet System.Array.'mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
_ReadMultiple DotNet System.Reflection.MethodInfo.'mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'


have anyone face the same problem?
if so, can someone share their solution