Control Chart Query

Dear Experts
As part of SAP QM Implementation we are implementing control chart functionality to get graphical representation against measured values for pre-defined parameters. I am facing two issues mainly:
1. When I try to calculate control limits (clicking calculator button) getting message "Control limits for track 1 could not be calculated". MICs has the upper limit and lower limit maintained which I can see in QAMV table for the inspection lots.
2. In the attached control chart , I am getting Upper Limit, Lower Limit and the Valuated Result in graphical form, when I try to display the inspection date, for the characteristics against inspection lot, I get lost. System is showing some date 7/14/14 against all the characteristics which I am not sure how to achieve.
Settings I made:
Sampling type: Fixed sample
Valuation mode: SPC inspection
W/O inspection point
Sample size: 5
Chart type:115 Shewhart chart for X bar/USA
MIC Settings:
Quantitative / Lower / Upper Sp. Limit / Sampling Procedure / SPC Characteristics / Summerised Recording / Required Char.
Inspection plan setting is:
SPC criterion : 020 task list char/material
Base qty : 1KG
Control Chart Configurations:
1. Control Chart Type -115
a) Change Control Limit not checked
b) Characteristics Type- Fixed Scope, Record measured values
c) Reference Axis (x-axis) - Time of Creation ( Do I need to change here to "Object Number" or "Time Of Inspection" ?)
Any input will be highly appreciated.
Regards
SK

Hello,
For Control limits your chart needs to closed. and offcourse for calculation u need to have more than one inspection lot. then system will calculate the same. UD is also required against lots.
Regards

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