Newbie: Problem with matching regular expression in notepad++

I am trying to match a pattern with a string in notepad++ software. But application is not able to find the pattern. What is wrong here?

Original string:

SubscriberLicenseTypeUndefinedSubscriberLicenseSubscriberLicenseType

Pattern:

SubscriberLicenseTypeUndefinedSubscriberLicenseSubscriberLicen

RegExp does not match for above mentioned pattern

But when i try to match for:
SubscriberLicenseTypeUndefinedSubscriberLicenseSubscriberLice

It matches.

Why so? Whats wrong here with character 'n'? I am a newbie, please help me.

The problem is not with the character 'n'. Problem is with the application itself. While searching for a pattern, notepad++ allows maximum 62 characters :mad:
Now i am trying with some different app.. :confused: