Program system

for calculation of rolling stock main dimensions

Content: Frequently asked questions to ...

... Bogies
... Educational license
... Calculation of articulated train sets
... Deflections of the suspensions
... Dongle (Hardware protection key)
... Language
... Licensing
... Program bugs
... Project files and databases
... System requirements
... Tramways
... Windows 9x



Question: How can I calculate the construction gauge for bogies?
Answer: The procedure for the calculation of the construction gauge for bogies can be found in the following short instruction.

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Educational licence

Question: Is an educational version for teaching and learning purposes available?
Answer: Yes, there is a special license for universities available. Please contact us.

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Calculation of articulated train sets

Question: How do DIMA calculate articulated trains?
Answer: The german document "Anmerkungen zur Gelenkzugberechnung mit DIMA" contains some hints for the calculation of articulated train sets with the program DIMA.

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Deflection of the suspensions

Question: According to UIC 505-1 the determination of the minimum heights above the running surface for coaches and vans, special wagons and multiple units has to examine deflection with a 30% overload of the sprung weight or total deflection. How does DIMA decide, which deflection is to be used?
Answer: For coaches and vans, special wagons and multiple units the more unfavorable deflection of the two cases is used in accordance with demand of the EBA. The deflection with a 30% overload of the sprung weight dz30 is a direct input value in the data base "Running gear". The total deflection will be calculated as sum of the values maximum spring displacement, primary spring Sfp and maximum spring displacement, secondary spring Sfp likewise from the data base "Running gear". The user can affect the selection over the size of the three input values.

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Dongle (Hardware protection key)

Question: Is a dongle available for USB-Port?
Answer: Yes, we change your old dongle for the parallel interface. Contact us via telefon or via e-mail.

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Question: Which languages can be selected in DIMA?
Answer: The following languages can be selected:
  • Deutsch (Deutschland)
  • English (Great Britain)
  • English (United States)
  • Français (France)
  • Slovencina (Slovenská republika)

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Question: What options are available for licensing?
Answer: There are two options for licensing the software:
  • Single-user licensing with hardlock (dongle) and local license file
  • Network licensing with floating licenses of a central server

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Program bugs

Question: A program bug occured - what has to be done?
Answer: Please report bugs via phone or E-mail, so we can fix it as soon as possible.

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Project files and databases

Question: Where can I find the databases and projects files?
Answer: Because of the new safety concept in Windows Vista normal users have no writing permissions in the program path (C:\Program Files). Therefore since DIMA 2.0 the position of databases and project files was changed. They're now in a path that is accessable for all users. Depending on the used Windows version this path is:


Windows 7 / 8 / 8.1 and 10
Databases C:\Benutzer\Öffentlich\Öffentliche Dokumente\IFB\DIMA\Datenbank
Project files C:\Benutzer\Öffentlich\Öffentliche Dokumente\IFB\DIMA\Projekte


The database path can be changed in the program under options/database connection. In the same new path the file DIMA.MDB has to be available.
The standard project path can be changed in the program under options/program.

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System requirements

Question: What system requirements must be met for operating the software?
Answer: The system requirements for DIMA 2.6x are:
  • Windows® 7 / 8 / 8.1 / 10 (32-bit- or 64-bit-editions),
  • Intel® Pentium® 4, AMD Athlon™ 64 or AMD Opteron™,
  • 1 GB of RAM,
  • 1 GB of hard disk space,
  • 1024 × 768 or higher resolution,
  • USB-Port for hardlock dongle (for single-user license),
  • Mouse.

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Question: Can I also calculate tramways with DIMA?
Answer: No, at the moment only standard vehicles can be calculated with DIMA. But an implemention for the calculation of tramways is planned. For questions or propositions please contact us.

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Windows 9x

Question: Can I also use DIMA on older Windows version than specified?
Answer: Yes, in principle DIMA will run on all Windows versions. Certainly no test have been made under Windows 9x and NT. Under circumstances there will be problems concerning the access of the databases. You can use DIMA with the following operating systems: Microsoft Windows XP/VISTA/7/8/8.1.

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