[Traminer-users] Error when using "seqformat" (from SPELL data) with "process = TRUE", and an external data frame for "pdata" ...

[Arnaud Trollé]

Hi all,
When using "seqformat" (from SPELL data) with "process = TRUE", and an external data frame for "pdata", as follows :
 > situations <- seqformat(data[,1:4], id = 1, from = "SPELL", to = "STS", begin = 3, end = 4, status = 2,
+                         right = NA, process = TRUE,  limit = 7644, pdata = pdata, pvar = c("id","birth"))

I get an error message :
Error in charToDate(x) : 
  character string is not in a standard unambiguous format

I read many threads about that issue, but could not find any helpful solution.Here are the structures of my data frames "data" and "pdata" :

> str(data)
'data.frame':	2428 obs. of  9 variables:
 $ ID_SQ           : Factor w/ 798 levels "1","2","3","5",..: 1 1 1 1 1 2 2 2 2 2 ...
 $ SITUATION       : chr  "En poste" "En poste" "En poste" "En poste" ...
 $ DATE_DE         : Date, format: "1997-09-01" "1999-05-03" "2003-01-01" "2006-05-02" ...
 $ DATE_A          : Date, format: "1999-04-26" "2002-12-31" "2006-04-28" "2007-11-24" ...
 $ SEXE            : Factor w/ 2 levels "Féminin","Masculin": 1 1 1 1 1 1 1 1 1 1 ...
 $ PROMO           : Factor w/ 6 levels "1997","1998",..: 1 1 1 1 1 2 2 2 2 2 ...
 $ DEPARTEMENT     : Factor w/ 10 levels "BC","GCU","GE",..: 1 1 1 1 1 4 4 4 4 4 ...
 $ NIVEAU_ADMISSION: Factor w/ 2 levels "En Premier Cycle",..: NA NA NA NA NA 1 1 1 1 1 ...
 $ FILIERE_SECTION : Factor w/ 4 levels "Cursus Classique",..: NA NA NA NA NA 4 4 4 4 4 ...

> str(pdata)
'data.frame':	798 obs. of  2 variables:
 $ id   : Factor w/ 798 levels "1","2","3","5",..: 1 2 3 4 5 6 7 8 9 10 ...
 $ birth: Date, format: "1997-01-01" "1998-01-01" "1998-01-01" "2000-01-01" ...

It seems to me that all date formats are OK.
But, clearly, something's wrong.
What am I doing wrong?
Thank you in advance for your help,Best,Arnaud.

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