Hi Masao,
You’re correct, the coercion dot exists in example VI as well. I just noticed it’s hidden and only becomes visible when I moved blue wires. I missed it in our remote session due to high resolution display on your side (& lower resolution display on myside).
However, we noticed in our session that example VI (SPI Master Write) works very well without any errors, and we even did the continuous run of the example VIs for repeatability for 10s of times.
I hope the change we did this morning is helpful to you, if the application doesn’t repeatedly run whiteout errors then I would recommend you to develop a simple plain VI with all required SPI write & read in linear sequence (without events or loops structures). I believe that would prove your concept before taking to the application. I strongly believe something on main application is bugging down to this issue.
Regards,
Ajay