i-Magic Catalyst (.ca) run file format

Introduction

As for the Fortius files, whenever fields have units associated with them, such as weight, distance etc., the Tacx software stores the SI unit any only converts to the Imperial system for display purposes.

Single byte characters (ASCII) are used throughout.

Note: I do not believe the scale factor is stored in this file. I am led to this conclusion because a) I cannot find it and b) the Tacx Analyser program does not display it for .ca files.

An .im file contains the following data blocks.

General information.
Program.
Ride information.
Ride data.

General Information Block

Field	Offset	Size	.NET type
Course name	0	30	Char[]
Unknown	30	10
WattSlopePulse	40	4	UInt32
TimeDist	44	4	UInt32
No. of program records	48	4	UInt32
Total		52

As for the Fortius Catalyst Run Files, the values of the WattSlopePulse and TimeDist fields indicate the type of catalyst program in use, based on the following table.

	0	1	2
WattSlopePulse	Watt	Slope	Pulse
TimeDist	Time	Distance

For example, if WattSlopePulse was 1 and TimeDist was 0, the catalyst program would be a Slope - Time based one.

Program Block

Field	Offset	Size	.NET type	Comments
Duration	0	4	UInt32	seconds
PulseSlopeWatt	4	8	Double	Pulse or slope or watt
Distance	12	8	Double	km
Total		20

Ride Information Block

This has the same layout as the .im ride info block.

Field	Offset	Size	.NET type	Comments
Unknown	0	4
Course name	4	260	Char[]
Terrain	264	260	Char[]
Year of ride	524	2	UInt16
Month of ride	526	2	UInt16
Day of week	528	2	UInt16
Date of ride	530	2	UInt16
Time of ride (hours)	532	2	UInt16
Time of ride (mins)	534	2	UInt16
Time of ride (secs)	536	2	UInt16
Unknown	538	10
Number of ride data records	548	4	UInt32	This seems to be 1 more than it should be for Catalyst
Unknown	552	4
Ride distance (km)	556	4	Single
Ride duration (seconds)	560	4	Single
Team name	564	20	Char[]
Rider name	584	20	Char[]
Weight of rider (kg)	604	4	Single
Gender?	608	1	Byte	0 = male, 1 = female
Height of rider (cm)	605	4	Single
Rider year of birth	609	2	UInt16
Unknown	611	2
Rider month of birth	613	1	Byte
Rider date of birth	614	1	Byte
Rider HR max	615	1	Byte
Rider HR min	616	1	Byte
Rider HR A Threshold	617	1	Byte
HR Zone 1 upper limit	618	1	Byte
HR Zone 2 upper limit	619	1	Byte
HR Zone 3 upper limit	620	1	Byte
HR Zone 4 upper limit	621	1	Byte
HR Zone 5 upper limit	622	1	Byte
Rider email	623	260	Char[]
Rider country	883	256	Char[]
Rider remarks	1139	256	Char[]
Course notes	1395	256	Char[]
Feeling	1651	21	Char[]
Temp	1672	11	Char[]
Cool down records?	1683	4	Int32	-1 if none present
Unknown	1687	6
No. of laps	1693	4	UInt32
Total		1701

Ride Data Block

Field	Offset	Size	.NET type	Comments
Distance	0	4	Single	metres
HR	4	1	Byte
Cadence	5	1	Byte
Power x 10	6	2	UInt16	Divide by 10 to get power in watts
Speed x 10	8	2	UInt16	Divide by 10 to get speed in km/h
Total		10