Is there a limit for string length entered in the Immediate tab?

If I try to set a variable to a long string, I get an error:

$test = "U9/aXgw+vCDKep ... ... DZMNCe0jXGCczMyt"; <- 1114 characters string
: Error syntax error, unexpected $end

It seems that the input was not completely read, and the debugger is complaining for not finding the final quote.

Probably there is a kind of limitation in the memo control. The problem is replicated when the input line was wrapped by the memo itself.
Try to set valie with two lines like below:

$test='a....g';
$test=$test.'g...z';