I'm struggling with inputes for arulesSequences in R
My data, lets call the dataframe df, looks like this 

```
 sequenceID eventID SIZE    event
1           1       1    1   E_351-
2           1       2    1       1-
3           2       1    1   30006+
4           2       2    1   20198+
5           2       3    1     111+
6           2       4    1     610-
7           2       5    1      26+
8           2       6    1   30006-
9           2       7    2 11+, 11

```

the next step as(df,"transactions") gives the following error

> 
> error in asMethod(object) : 
>  can not coerce list with transactions with duplicated items
>  Calls: as ... .nextMethod -> callNextMethod -> .nextMethod -> as -> asMethod
> 
> 
> 

I just spent 2 days trying to just input my data in cspade without success !