SAP Message BF00196 - Invalid character "&" in text &

Diagnosis
You have entered the character "&V1&" in text "&V2&" which &V3& does notpermit.

Procedure
Check the characters in the text. The following characters are allowed:
IF &V3& EQ 'ZENGINKYO'.
1234567890
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
§¨©ª«¬­®¯±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖרÙÚÛܦÝ
Þß\,.¢£()-/+':?
ENDIF.