Table field length Issue

Hi ,

We need to create a table field with char300, it is showing the attached error.

(Field 'XXXX' is too long (Specify a length between 1 and 255).

We are using the ECC6.0 with SAP_BASIS 700 SP 24 and SAP_APPL 600.

But we have another system with ECC 6 EHP6 in which is allowed to use Char300 data element.(SAP_BASIS 731 SP 6 and SAP_APPL 606 SP 6).

Kindly help to resolve .

Thanks in advance

Regards

Swethun