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1996-01-31
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Powerbase 26 January 1996
========= ===============
Powerbase version 5.24 ("final" RO2 compatible version)
Powerbase versions 6.x (for RiscOS 3.x only)
© Derek & Steven Haslam 1989-1996
Derek Haslam, 112 Keighley Road, Colne, Lancashire BB8 0PH
Please make cheques payable to Derek Haslam.
Copyright subsists in all versions of Powerbase. We reserve the right
to withdraw support and authorisation to distribute Powerbase.
No warranty, express or implied, is made about the suitability of
Powerbase for any purpose. We can not be held responsible for any loss
or damage to your health, wealth or marriage due to the action or
inaction of Powerbase.
Powerbase is shareware. You are allowed to copy it freely as long as
you do not do so for any profit, and that the application is kept
intact and unchanged. If you find you use Powerbase on a regular
basis, you should register your copy with us. For £10.00 you will get
support and “free” upgrades. When registering please say whether you
require a RISC OS 2 or RISC OS 3.1 version. The latter has some extra
features not found in the former. Further changes to the RISC OS 2
version will be limited to fixing reported bugs.
Updates are supplied as needed rather than on a regular basis. If you
encounter any problems or need an additional facility, please send a
disc with the program and database that you are using and give as much
information as possible about how and under what circumstances the
program misbehaves. (It is not possible to give a meaningful answer
to a letter that says merely "it doesn't work" !) If you have an
unusual system (eg colour card, RO2, RiscPC) please let us know.
Limited telephone support is available most evenings and sometimes
during the day.
New users of Powerbase do unexpected things, and reach parts of the
code the programmers don't normally use. Because of the feedback we
have recieved, minor upgrades have been appearing almost daily,
amounting to a major upgrade about every six months. Also, some nice
people have sent us small (like !Friends and !Boxes) sample databases,
and we would be pleased to receive more, or user functions or
Powerbase-specific utilities for distribution in the public domain.
To receive the latest version of Powerbase, just send us a formatted
disc (E format or HD) or four first class stamps. If you would like
any extras, please tell us which ones you already have.
Direct mail-merge is implemented for Impression, including Publisher
(v4.01 onwards) and Style (v3.03 onwards), and two sample files are on
the disc. Ovation uses CSV files for mail-merge, and a sample file is
on the disc. CSV (comma separated value) files are also useful to
transfer data to text editors (ie Edit and StrongEd) which do not
support mail-merge.
Powerbase is unlikely to run from an archive or to use an archived
database: !CDList in the Examples archive gives a buffer overflow error
instead of loading. Powerbase is also unlikely to run from CFS.
Contact us at:
Powerbase Support, 112 Keighley Road, Colne, Lancashire BB8 0PH
When registering, please send cheques payable to Derek Haslam.
Tel. 01282-866835 (UK, country code 44)
The database !Elements is used extensively as an example in the
tutorial, and !Friends is used in the quick tutorial. Other example
databases are available to show the flexibility of Powerbase.
Major updates will be sent to Arcade BBS, APDL, and to the Datafile PD
Library.
Powerbase users should be aware that the use of a database to store
personal details other than those of immediate family members may
render them liable for registration/compliance with the provisions of
the Data Protection Act. (Data Protection Registrar, Springfield
House, Water Lane, Wilmslow, SK9 5AX. Tel. 01625-535777)
Important note to existing users of versions prior to 4.93 (NOT 4.993!!)
========================================================================
v.4.93 was the first to allow indices to be case sensitive. If you create
a database using that, or a later, version and try to run it on any
version of Powerbase prior to v.4.93 an error will occur. It is usually
either “String too long” or “Address exception”. The problem is most
likely to afflict a user who is given a database by someone using a recent
version and who then tries to run it on an earlier one.
It is also possible for a database created with, and working
satisfactorily with, a pre-4.93 version to suddenly start giving errors
after being used on a later version. This will only happen if indices have
been created, or the primary key rebuilt, under the later version.
Deleting the contents of the Indices directory may then put matters right.
If it doesn’t then rebuilding the primary key under the older version
will.
The problem was alleviated somewhat in v.4.98. Databases created with this
will work on earlier versions of Powerbase provided you do NOT make any
index case-sensitive.
The best solution, of course, is to send us a disc with sae (or 4 first-
class stamps; discs don’t really enjoy postal journeys) and ask for an
upgrade. There is NO problem running databases created with a version
EARLIER than 4.93 under a version LATER than 4.93.
=========================================================================
NOTE for RISC OS 2 users
========================
Some versions of Powerbase give an error during initialisation. This is
apparently due to a bug in RISC OS 2 which causes corruption of the BASIC
stack if a window template with a name shorter than 4 letters is used.
(No, I don’t understand it either!) RISC OS 3 doesn’t mind such short
template names at all. If any RISC OS 2 user experiences problems, please
write for version 5.24 or later.
==========================================================================