CL_GUI_ALV_GRID Short Dump convt_no_number

Hi guys,

i have an alv with an editable column, named comment! i have created an own data element in se11 with char100! furthermore i create my fieldcat with LVC_FIELDCATALOG_MERGE on the base of my structure (created also in se 11, containing my comment field)!

if i enter a text into the comment culumn (e.g. 'Test') i get the short dumpp when doing anything (!

if i enter a number, everything works pretty fine!

i also checked the table of the fieldcat, and the data type is char 100 for this column. some days ago the hole alv has worked pretty fine...and the last change that i remember is, that i changed the the structure for my alv.

before i set: comment char 100

now i created an own domain, also using char 100....for having a custom description for this data element

kind regards