I have use field MATNR at my ztable.
I have created a table and created table maintenance for maintaining entry via SM30 but while opening this via SM30 I am getting following error
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Message no. BMG140
The material number XT1 exceeds the length of 1 characters currently defined for material numbers in Customizing.
Either enter a shorter material number or ask your system administrator to increase the allowed length of material numbers in your system.
You define the length of material numbers in Customizing for the Material Master. The maximum length allowed is 18 characters.
Proceed
How to solve this error ?