Please check with your fieldcatalog which you are using.
See the every statements in the Fieldcatalog where you are populating this.
May be you used a field that is not declared in the internal table or the internal table is not declared any where.
Please go through thoroughly with your fieldcatalog.
Try to correct your field catalog, there is a problem with it, if you are not able to find the error cause, then
- If the dump happened after initial display of grid, execute [The Consistency Check|http://help.sap.com/saphelp_470/helpdata//EN/d6/23253963143e6ae10000000a11402f/frameset.htm] on screen
- Else add the control in the call, check I_INTERFACE_CHECK parameter