Not a frequent use case, since linear read mode is not really necessary for single-iteration files anyway, but it can happen e.g. when using openpmd-pipe as in openpmd-pipe --infile simData_000100.bp --outfile ....
Since linear read mode does no parsing at construction time at all, it cannot initially know that the file is indeed file-based and needs to add a later check.
Not a frequent use case, since linear read mode is not really necessary for single-iteration files anyway, but it can happen e.g. when using openpmd-pipe as in
openpmd-pipe --infile simData_000100.bp --outfile .... Since linear read mode does no parsing at construction time at all, it cannot initially know that the file is indeed file-based and needs to add a later check.