Data type is giving error

BUt Hi guys,

I am  trying to create a progrem in SE38 and while assigning the data type to a column its giving me error.

My  Column is Quantity which has a currency key. So in ABAP Program while declaring Data I wrote

COPASLTYQ (17) TYPE  P((n+1)/2),

COPASLQTU (3) TYPE  C(5),

G_QVVQ01 (17) TYPE  P((n+1)/2),

G_UVVQ01 (3) TYPE  C(n),

I researched and found this link on Help.SAP.Com

Data Types in the ABAP Dictionary - ABAP Programming (BC-ABA) - SAP Library

But it did not  help me.

Any ideas what am I doing wrong?

Regards

Prashant