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I get the follwing error while importing a .gds file in cadence IC 6.16
ERROR (XSTRM-80046): You are trying to modify the tech database, but the
tech database is not writable. Check the tech database file and parent
What is tech database? How to fix this?
It seems that if I do not attach to a technology library while importing I do not get this error. Is it OK if I import a .gds without attaching it to a techlib?
In reply to radiowaves:
You could, but it's probably not a good idea.
You could either go to the Geometry tab on the stream in form and turn off "Skip Undefined LPPs", or you could create a library which references your technology library (rather than attaches to it), and then any undefined layer purpose pairs will be added to the library's own incremental technology database. In other words, the previously known layer purpose pairs will be in the main technology library, but any extra undefine LPPs will be added to your local library's incremental tech db (which tops up the main tech library).
In reply to Andrew Beckett:
Thank you very much. So, I followed these steps:
1. Created a library and referenced to technology library.
2. Imported a .gds to this library by filling Xstream In form as follows.
Stream file: .gds
Top level cell: Blank
Attach Technology Library: Blank
Load ASCII Tech File: Blank
I hope this is OK.
Should be. I think the log file will tell you about any undefined layer purpose pairs that got created.
i am facing an import issue too on IC616.
i tried both k2 and streamin and both report the following:
#1 streamin - ***warning; skipping Unknown record 
***warning; Unexpected record length found
#2 k2_viewer - ERROR: Record Type Token : 60
ERROR: word type 63 encountered. (only 0 - 3, 5 & 6 are valid)
Not sure whats wrong.
In reply to RahulDutta:
My assumption is that the stream file that you are reading is either corrupted, or it is using some non-standard extensions (that seems less likely). According to the documentation, record types 60-69 were used by an old Calma GDSII application called Custom Plus and are not used by Virtuoso - so it seems unlikely they would be used in any modern application.
Where did the stream file originate from? Has it been compressed mistakenly?
Perhaps you need to contact customer support.