Formula Errors when using Remedy....

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This crystal report errors were generated when running a 'Remedy' Application report from the SHR:Reporting form, please see below:We are using ARS 4.51 on MSSQL server and using the SHR:Reporting form. The errors are as follows:

1) No charts or graphs
Case Activty--> Weekly Case Volumes Graph produces blank pages
Case Activty--> high Volume Departments Charts produces blank pages

2) Error in formula <Group #1 order> ‘ if IsNull({@Days Active})
My Resolved Cases--> By Days Active
My Resolved Cases--> By Priority

3) Error in formula <Group #2 order> ‘ if IsNull({@Days Active})
Open Cases--> Current Open Cases
Open Cases--> Open Cases for Date Range

4) Unexpected file format
Case Activty--> Activity By Assignee