Hi kanthalepriyanka, welcome!
If I understand what do you want to do, I suggest something like this:
LOAD CSV WITH HEADERS FROM 'file:///fileName.csv' AS line FIELDTERMINATOR '|'
MATCH (r:Regulon{Regulon_ID: line.Regulon_ID}), (s:SelfSufficiencyInGro...
Try to rewrite the code in this way:
CREATE CONSTRAINT ON (e:Sender) ASSERT e.sender IS UNIQUE
CREATE CONSTRAINT ON (e:Receptor) ASSERT e.receptor IS UNIQUE
LOAD CSV WITH HEADERS FROM 'file:///Libro1.csv' AS c FIELDTERMINATOR ';'
Merge (e:Sender {sen...