when i try to make a package i have an error like this :

Erreur dans validObject(.Object) :
  objet de classe "ScalarCharacter" incorrect : ScalarCharacter must have
length one


 here my script:

library(pdInfoBuilder)

ndf <- list.files(pattern = ".ndf", full.names = TRUE)
xys <- list.files(pattern = ".xys", full.names = TRUE)
seed <- new("NgsExpressionPDInfoPkgSeed",
ndfFile = ndf, xysFile = xys,
author = "MOZAR Michael",
email = "michael.mozar@univ-perp.fr",
biocViews = "AnnotationData",
genomebuild = "Retroryza",
organism = "Rice", species = "Oryza Sativa",
url = "none")

here my sessionInfo :

library(pdInfoBuilder)

ndf <- list.files(pattern = ".ndf", full.names = TRUE)
xys <- list.files(pattern = ".xys", full.names = TRUE)
seed <- new("NgsExpressionPDInfoPkgSeed",
ndfFile = ndf, xysFile = xys,
author = "MOZAR Michael",
email = "michael.mozar@univ-perp.fr",
biocViews = "AnnotationData",
genomebuild = "Retroryza",
organism = "Rice", species = "Oryza Sativa",
url = "none")

and my traceback() :

ndf <- list.files(pattern = ".ndf", full.names = TRUE)
xys <- list.files(pattern = ".xys", full.names = TRUE)
seed <- new("NgsExpressionPDInfoPkgSeed",
ndfFile = ndf, xysFile = xys,
author = "MOZAR Michael",
email = "michael.mozar@univ-perp.fr",
biocViews = "AnnotationData",
genomebuild = "Retroryza",
organism = "Rice", species = "Oryza Sativa",
url = "none")

thanks for your help
-- 
MOZAR Michaël
Master Bioinformatique
Université de Nantes
0688715937

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