fix typo
(cherry picked from commit 9a966151fa44c417de60fa670469a07e642981d6)
dseries: variable in error messages isn't set

(cherry picked from commit 3f4f348a0a43a47a126025dd2bbbfe5b0f8b9fea)
dseries: bug fix: add delimiter for importdata for .csv files

(cherry picked from commit 884cbc3fbe2009f5cf8d5cb879ec9be1e2a7c368)