DRAMA Bugs and Wish list

This document documents known outstanding bugs and items on the wish list. This list was started at DRAMA V1.1

SdsResize bug when downsizing.

Noted 01-Sep-1997, Status: All systems, Resolve from V1.2b1 of DRAMA

SdsResize does not release allocated memory when downsizing structures. As a result, the following sequence requires 2Mb of memory

• Create 1 Mb item
• Resize it to 1Kb (Sds keeps the original 1Mb)
• Reisze it to 1Mb (Sds grabs another Mb before releasing the original Mb)

Unable to communicate with tasks

Noted 01-Sep-1997, Status: Unix only, Resolved from DRAMA V1.2b1, workarounds available for older systems.

Placing of FIFO and IMP_SCRATCH files in /tmp makes them subject to deletion by cron jobs. The programs will continue to run after the FIFO and IMP_SCRATCH files have been deleted, but new connections to the tasks concerned will fail.

Possible work arounds

• Ensure the clean up of /tmp only removes files which are not open. (I don't know how to do this, if you know, please tell me)
• Change the algrothim of the /tmp clean up such that it is not going to clean up files created by IMP in the time span your applcations are running (e.g. if your applications typically run for 24 hours, the /tmp cleanup should ignore files less thyen 2 days old)
• Ensure IMP_SCRATCH does not point to /tmp. This does not result the problem with user interface tasks, which put their FIFO files in /tmp.

VxWorks ImpPulse crashes

Noted 01-Sep-1997, Status: VxWorks Only, Solved from Version 1.1.1 of DRAMA, workaround available for V1.1

When you specify a pulse line in a VxWorks IMP Start up file, you must specify the machines by name, not number.

Workaround: In your VxWorks start up scripts, use hostAdd() to add the names of all relevant machines to your VxWorks machine.

IMP does not always find files in executable directories

Noted 01-Sep-1997, Status: Resolved from version 1.2b1 of DRAMA, workaround available for older versions.

IMP does not always find start up files and the imppulse executables when these are placed in the same directories as the IMP transmitter/receiver executables.

Workaround: Put the start up files and imppulse executable in the default directory.

Bulk Data support required

Noted 01-Sep-1997, Status: Resolved./P>

DRAMA should support the IMP Bulk data protocol. This will make DRAMA more effecient in the use of Memory.

Starting IMP Master

Notesd 01-Sep-1997, Status: Resolved

An appropiate way to start up the IMP Master task on a remote machine is needed.

Better control of ERS required

Noted 01-Sep-1997, Status, DulErs routines can be used to control Ers in subsiday tasks from V1.2b1 of DRAMA.

Better control of ERS is required when messages may be output in the background of other operations

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