Hi there,
I experienced the same problem from the beginning of my
project, but I used it not only with orchestration, but
with functoids as well. In my case as soon as I changed
something in my assembly and re-compile it, it is not
available for BizTalk even I updated GAC. However, to make
it available for your solution, after you re-compile it
and updated GAC, you should save your whole solution and
close it!
As soon as you will open it, it will be available and you
do not need to remove and re-enter reference to your
solution.
If you will change the version number, you will have a big
surprise at all of your functoids using this assembly as a
source- all information will gone and you will need to re-
enter the assembly name, version and function name (In my
case it was really bad, becouse I had about 20 functoids
and all of them lost this info). So, do not change version
number and you will be fine!

Alex

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