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3.15
File manipulation commands
3.15.1
Standard Commands
Access mode string Meaning
r
Opens file for reading operation only. Error will be returned
if target file does not exist.
r+
Opens existing files for both reading and writing operations.
Error will be returned if target file does not exist.
w+
Create a file and open it for both reading and writing. If
target file does exist, current contents are destroyed.
Purpose
Κ
To open (r mode) a file and get the file for further
processing.
Syntax
Κ
F% = OPENIN filename$
Example
Κ
FilePath$="C:\DATA\Test.DAT"
fileID%=OPENIN FilePath $
Description
Κ
F%
is an integer variable to assigned to the result.
F%
Meaning
0
Open file fail.
Other
Open successfully.
It returns the file handle.
filename$
is a string variable indicating the file path.
In case of error, open will return an integer value of 0. You
can use the GET_FILE_ERROR command to get the file
error code. Possible error codes and their interpretation are
listed below:
GET_FILE_ERROR Meaning
1
Filename is a NULL string.
6
Can't create file because the
maximum number of files
allowed in the system is
exceeded.
File path error.
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