Troubleshooting & Common Issues
No workable design for a level
Possible causes
- –The critical difference is small compared with the analyte's imprecision
- –The TEa is smaller than twice the within-lot imprecision
- –The chosen power needs more than 40 samples
Recommended action
Use the smallest workable critical difference Data Entry offers, or lower the power.
The uploaded file could not be read
Possible causes
- –Columns differ from the Data Upload Guide
- –A level in the file is not one of the design's levels
- –A Current lot or New lot cell is not a number, or the file has summary rows
Recommended action
Lay the file out as the Data Upload Guide shows, or enter the results in Data Entry.
The new lot is not accepted
Possible causes
- –A real shift between lots
- –One lot was calibrated long before testing, or with a different calibrator lot
- –A sample far from the level's target concentration
Recommended action
Review calibration and QC, check the samples against the target concentrations, and repeat the comparison.