6.10 Define Checksum Parameters for a Variable: NF90_DEF_VAR_FLETCHER32
The function NF90_DEF_VAR_FLETCHER32 sets the checksum property for a
variable in a netCDF-4 file.
This function may only be called after the variable is defined, but before
NF90_ENDDEF is called.
Usage
function nf90_def_var_fletcher32(ncid, varid, checksum)
integer, intent(in) :: ncid
integer, intent(in) :: varid
integer, intent(in) :: checksum
integer :: nf90_def_var_fletcher32
NCID- NetCDF ID, from a previous call to NF90_OPEN or NF90_CREATE.
VARID- Variable ID.
CHECKSUM- If this is NF90_FLETCHER32, fletcher32 checksums will be turned on for this
variable.
Errors
NF90_DEF_VAR_FLETCHER32 returns the value NF90_NOERR if no errors
occurred. Otherwise, the returned status indicates an error.
Possible return codes include:
NF90_NOERR- No error.
NF90_BADID- Bad ncid.
NF90_ENOTNC4- Not a netCDF-4 file.
NF90_ENOTVAR- Can't find this variable.
NF90_ELATEDEF- This variable has already been the subject of a NF90_ENDDEF call. In
netCDF-4 files NF90_ENDDEF will be called automatically for any data
read or write. Once enddef has been called, it is impossible to set
the checksum property for a variable.
NF90_ENOTINDEFINE- Not in define mode. This is returned for netCDF classic or 64-bit
offset files, or for netCDF-4 files, when they were been created with
NF90_STRICT_NC3 flag. (see NF90_CREATE).
NF90_EPERM- Attempt to create object in read-only file.
Example
