Evaluation version's will support Named Pipe Server Terminal plugin

... Can I use Named Pipe Server Terminal to solve the error.. Since i m using evaluation version.

When on evaluation, you can use absolutely everything -- including Pipe Terminal and scripting.

However, the your script is not a valid Jancy script.

A simple echo script looks something like this:

void main() {
	char buffer[256];
	for (;;) {
		size_t size = receive(buffer, sizeof(buffer));
		transmitAll(buffer, size);
	}
}

Of course, you can modify the reply packet before transmission as you like, e.g.:

void main() {
	char buffer[256];
	for (int i;; i++) {
		size_t size = receive(buffer, sizeof(buffer));
		string_t reply = $"received block %1: '%2'"(i, string_t(buffer, size));
		transmitAll(reply);
	}
}

You can also try our stock scripts ("Load stock script" in the drop-down next to the "Open" button on the Script pane) -- they can be used as a starting point for something more meaningful.

Also, check in-app scripting tutorials here:

https://ioninja.com/doc/developer-manual/tutorials.html