Talend GlobalMap variable Error, NullPointerException to count my inputrow NB_LINE

Question

I need to count how many inputs I have before starting the component tDenormalizeSortedRow (if I put a wrong number of line, the last values are lost).

The problem is that I used a global variable:

((Integer)globalMap.get("tConvertType_1_NB_LINE"))

But it throws an error:

Exception in component tJava_1 (TestIDuniqueextract)
java.lang.NullPointerException

I don't know why the global variable is null:

Answer 1

The global variable return NULL value if you use it in the same flow. So i need to send value to the next subjob with thashoutput/input and then use the global variable

refer to this link : (https://community.talend.com/s/question/0D53p00007wWjJWCA0/globalmap-variable-error-javalangnullpointerexception)

Regards