As per below regulations all description elements in SAF-t (LT) should be automatically truncated to 256 characteds (purchase/sales invoice, invoice lines description, GL and FA desctiptions and Payment descritpions):

SAF-T legislation in Lithuania

• Article 16 of the Law on Accounting;
• Resolution No 699 of 01 July 2015 of the Government of the Republic of Lithuania;
• Order No VA-49 of 21 July 2015 of the Head of the State Tax Inspectorate under the Ministry of Finance;
• Specification of XSD description of the XML scheme of SAF-T, as prepared by the State Tax Inspectorate under the Ministry of Finance.

Schema in english:

https://www.vmi.lt/evmi/documents/20142/725548/SAF-T_XSD_specifikacija_v2.1_F+en.pdf/23775a8a-0ba7-6b9c-1fc9-cfceb4ba8bd0?t=1606462594737

Reg ticket number 2502051420001009.

Becasue of missing limitations such errors appears and XML for SAF-t (LT) is not accepted:

ERROR: Element '{https://www.vmi.lt/cms/saf-t}Description': [facet 'maxLength'] The value has a length of '267'; this exceeds the allowed maximum length of '256'.