Experimental Physics and
Industrial Control System

Dear All

First of all, thank you for your help.

I have the following question.

Before calling the iocsh (argv[1]) function that runs the st.cmd file, the ca_search or ca_create_channel function works normal.



However, if a ca_search or ca_create_channel function is called after the iocsh (argv[1]) function is called, 

a Segmentation fault or dbContext preemptive callback problem occurs.

In other words, I made a driver called pv in st.cmd and made a thread on this driver to call ca_search


> I don't know the cause.

Our st.cmd file is as follows.

I would appreciate it if you could solve my curiosity.

Have a good day.

Thank you.