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Error in setting covariates

covariate error

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#1 vetpharma



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Posted 01 July 2022 - 12:57 PM



I am building a pop PK model for L-Dopa. After I mapped my covariates, I ran the model, but I I am receiving a strange error saying that covariate for subject are not set. It starts with first covariate for first subject. After removing that covariate, it gives error for second covariate in a row.  So I would appreciate it if you help me with this problem.




Edited by vetpharma, 01 July 2022 - 01:00 PM.

#2 bwendt@certara.com


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Posted 01 July 2022 - 01:06 PM

Hi Amir,


there is no screenshot of your error message. We would need your Phoenix project file to diagnose the root cause. Could you share? If not, please send a message to support@certara.com where we could handle it as well.



#3 smouksassi1


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Posted 04 July 2022 - 10:53 AM

this error mostly occur when your subject has no value at all for a covariate i.e missing


it is your responsibility to impute put the value you want in the data 


if there is a value at the start of the subject it will be carried forward automatically but we still need a value at the start

check your data for the first subject and send a screenshot  or the whole project as Bernd asked


ID TIME Weight

1    0        70

1  12         .

1  24         75 

Also tagged with one or more of these keywords: covariate, error

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