Syntax error around Cypher comments

Neo4j Graph Platform Cypher
3

Hi. There is a script between the first LOAD and the "t.inUse = true;", then there are 6 lines of comments, followed by another script. If I delete the comments everything is fine!

Here is another one:

Line 1: :param x => "value 1";
Line 2: // :param x => "value 2";

error:

Error: Syntax error at line 1 col 1:

:param customerSystem => "file:///C:/Users/rmasr/Code%20Excellence/S4HANA%20N4J%20-%20Documents/DATA/-----/";
^
Unexpected ":".