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In this manual, anything displayed on the Cambridge Z88 screen is shown in a computer typeface, such as

Name of file to save

Anything that you should type at the keyboard is shown in a different typeface to designate the keyboard keys; for example

You are invited to a party

The keys on the keyboard with a special function are shown in the text with key legends. So, for example, if you are asked to type

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ENTER

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ENTER

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In general, references to menu headings are in bold caps; for example LAYOUT.

References to individual commands are in bold; for example Save or Load.

References to options displayed by a command are in italics; for example Save only range of columns.

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CTRL

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The cursor keys are represented as Image Removed, Image Removed, Image Removed and Image Removed key on normal PC.

PipeDream error messages

-ve root	The argument to the SQR function was negative; eg SQR(-1).
All columns zero width	Attempt to set the width of all columns to zero.
Bad argument	The argument to a Next Match (BNM) command was given with no prior Search command.
Bad column	The Sort (BSO) command was given with an invalid column specification.
Bad date	The argument to the DAY, MONTH, or YEAR function is not a valid date; eg DAY(27).
Bad file	The file specified was not a valid file.
Bad index	A CHOOSE, or INDEX function was called with an invalid index; eg CHOOSE(-2,1).
Bad list file	The list file loaded by the Load command (FL) does not contain valid file names, or was not saved with the Save Plain text option.
Bad name	The name specified in a Load, Save, or Name command was not a valid file name.
Bad number	The argument to an Insert Highlights (PHI), Remove Highlights (PHR), Highlight Block (PHB), or Decimal Places (LDP) command was not in the valid range.
Bad option	The option was not valid for the command.
Bad range	The range of slots specified in a Replicate or Save command was not a valid range; eg, Save only range of columns C A.
Bad slot	The command was given an invalid slot reference; eg Go to Slot (CGS) A0.
Bad A ^ field	The ^ sequence in a Search or Replace string was invalid; e.g. String to search for ^H
Divide by 0	An expression attempted to divide by zero; eg 2/0.
Edge	The block being copied or moved would not fit within the maximum possible sheet size; eg, an attempt to copy from A1 Z6 to AA1.
Editing expression	The specified command is not available while editing an expression; eg, Load (FL).
End of list file	The end of the List file has been reached; eg Bottom File (FB) at the end of a document.
Escape	The  Highlight lightgrey class key lightgrey ESC key was pressed while processing a document.

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