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TrendViewer 3 COM FAQ-List

General questions

Question:
Can TrendViewer 3 be used in a .Net development environment?
Answer:
Yes. TrendViewer 3 is a Com-Object (Ocx), but can be fully used and is tested under .Net 1.1. and 2.0.
Question:
Under which ambient conditions can TrendViewer 3 be used?
Answer:
TrendViewer 3 was tested under the following environments: Platforms: Windows2000 and XP. Development environments: .Net 1.1; .Net 2.0; VB6; VC6
Question:
Is the number of curve data points restricted in TrendViewer 3?
Answer:
The number of datasets depends on the main memory of the deployed computer. The application itself must therefore control the main memory. The number of datasets can also be predefined explicitly in TrendViewer 3.
Question:
What is the main difference between TrendViewer 3 Standard Version and Professional Version?
Answer:
TrendViewer 3 Professional Version allows to arrange scales interactively (using the mouse) and move curves or individual data points.TrendViewer 3 Standard Version allows to move scales to the desired position by setting the respective properties only.
Question:
Can I deactivate the daylight saving time in the time scale?
Answer:
No. TrendViewer 3 uses the system functions to compute the time display, the daylight saving time can therefore not be deactivated.

License questions

Question:
Why is TrendViewer 3.ocx still in demo mode after purchasing and installing a license?
Answer:
Before embedding TrendViewer into an application container the lic file must be copied into the TrendViewer installation directory. If TrendViewer was operated in demo mode first and is licensed afterwards, it is necessary to copy the lic file to the installation directory and reimbed the TrendViewer component into the application container. TrendViewer must therefore be removed from the respective control, form etc and be reimbedded by using the toolbox.
Question:
Could there be other reasons why TrendViewer 3.ocx does not recognize the license file and display 'Demo Version' in the TrendViewer-Window?
Answer:
The license file name could be incorrect or the license could be in the wrong directory. The license file name "trendviewer3.lic" must never be changed. Move "trendviewer3.lic" to the same directory that contains the registered TrendViewer-OCX and TrendViewer will be recognized.
Question:
What can I do if several trendviewer3.ocx are installed?
Answer:
Often several trendviewer3.ocx are installed on a computer (e.g. in the TrendViewer-directory and in the system directory). The registration of more than one trendviewer3.ocx is inadmissible. The license file must be contained in the same directory as the registered OCX in order to be recognized. To solve the problem of too many TrendViewer.ocx on your computer, search the whole system for trendviewer3.ocx and delete all but one. After that, register the remaining OCX with program REGSVR32.exe and copy the license file to the same directory.

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