When we change the layout of ALV using Crystal Report view, There's an error that "Crystal reports cannot be displayed: CR101".
To fix this error, just apply this SAP note : 1805676
Notes : Our SAP Basis release 731 SP04. In SP07 there's a correction delivered for this error.
This is the reason for that error :
ABAP server exchange data with
Crystal Viewer over XML files. On of the XML files called "Presentation
XML" contains invalid value for date: "
The issue happens only if you use generic report. The issue does not appear if you use specific report.