Error with custom srv

[gwaxG]

Hello,
I wanted to use this package in my work, but I met a problem with custom services.
When I launch the example "serviceprovider-custom.go" and try to call this service through the CLI, I get this:
"ERROR: Unable to load type [my_package/TestService].
Have you typed 'make' in [my_package]?"
The error is the same for custom messages.
How can it be solved?
I would appreciate any help!

[aler9]

Hello, if you want to use cli (i.e. rosservice call) with custom messages, written with Go, Python or C, you have to pass the message definition to the cli.

You have to write the .srv equivalent of the Go structure, that in case of serviceprovider-custom.go is

float64 a
string b
---
float64 c

Then you have to insert it into a standard ROS project and compile it with cmake.

Finally, you have to load the project with source workspace/install/setup.bash.

Then, you can finally call rosservice.

Unfortunately it's not a goroslib problem, is the standard procedure to follow when dealing with custom messages - that's the reason why custom messages are avoided when not strictly necessary.

[gwaxG]

It works, but it is also necessary to point msg.Package ros:"my_pacakge" to the correct package.
It was not clear how it works if we want to use Go nodes which do not need message and service definitions.
Thank you for your explanation!