Experimental Physics and
Industrial Control System

On 10/24/19 1:45 PM, Rolf Keitel via Tech-talk wrote:
> I am working on a CA client and am getting the following exception:
> 
>  
> 
> CA client library tcp receive thread terminating due to C++ exception "Invalid argument"

My guess is that this originates as an EINVAL error code.

> What exactly causes this exception?

Good question.

The process I'd follow starts with running in gdb with a breakpoint set in the
c++ exception base class constructor.  With gdb this is "break std::exception::exception".
This will break each time an exception is to be thrown.  Be aware that this may not be
the exception which you see.  So the first time through just "continue" to make sure
there aren't further exceptions throw.

When you identify the last exception being thrown, the stack trace will hopefully give
some idea why.


> I had a quick look at the EPICS code  (3.14.12.5) but came up empty-handed.

The specific string may come from strerror() or similar.

References:

CA exception Rolf Keitel via Tech-talk

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