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Ora-1400 insert null error

893037Oct 7 2011 — edited Oct 7 2011
Hi guys,

I'm having a problem where I'm trying to select the PK value from table A to insert it into my table B.
I'm not getting any problems when I hard code the value into the table A.
Getting this problem after i create sequence and using nextval to create a unique primary key in table A.
Any advises?

Using : sql developer 10g on Ubuntu 11.04
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Locked on Nov 4 2011
Added on Oct 7 2011
#error, #sql-developer
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