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KB83266
Full FTP directory may not be returned by the control engine
Revision:  2.0
Published:  12/10/2015
Applies To
SNAP-PAC-S1
SNAP-PAC-S2
SNAP-PAC-S1-W
SNAP-PAC-S2-W
SNAP-PAC-R1
SNAP-PAC-R2
SNAP-PAC-R1-W
SNAP-PAC-R2-W
SOFTPAC
OptoEMU Sensor
Versions
Problem affects versions:  
R7.0a through R9.4b
Problem is fixed in version:  
PAC Firmware R9.4c

SYMPTOMS

If a directory on the controller contains a lot of files, sending the PAC Control FTP "dir" command may return only a partial listing.

WORKAROUND

To avoid this problem, you can limit the number of files in a directory and limit the lengths of file names. Otherwise, if you have firmware R9.3e or higher you can do the following:
Send the "dir" command to the FTP driver and include ",TableName" after it. The directory listing will be placed into that table, one directory entry per table element. This method will give you the full list of files, but you should be aware of the following things:

  • The compiler can't check the command to verify that you've entered a valid table name; if the included name is invalid, the command will return a -28 (Object Not Found), but that means you won't find out until runtime.
  • A table passed as a parameter to a subroutine can't be used, but a table local to the subroutine will work.

RESOLUTION

Opto 22 has resolved this issue.

Relevant Downloads
No relevant downloads have been specified.
Questions? Contact Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com

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This Opto 22 Knowledge Base ('OptoKB') article is intended to provide general technical information on a particular subject or subjects and is not an exhaustive treatment of such subjects. Accordingly, the information in this OptoKB article is not intended to constitute application, design, software, or other professional engineering advice or services. Opto 22 may modify the OptoKB articles at any time. Before making any decision or taking any action which might affect your equipment, you should consult a qualified professional.

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