Hi Ken,
Yes, I think I have reported this before, maybe there should be a FAQ
list somewhere.
Just renaming SLX in OS (mv a.slx b.slx) will create all kinds of weird
errors, the correct way to create a file with a different name is to
save the project with a different name inside Simulink.
If I remember correctly, the root cause of this is that the .slx file
contains the file name and is dependent on it. Yes, I cannot think any
other software doing this and it is a very bad design choice IMHO.
Cheers,
Kaj
On 19.2.2025 0.30, Ken Semanov wrote:
Changing the file names of an SLX file can cause LUT errors during
jasper compiles. These errors are fatal and will drop the compile to
command line in Matlab. The CASPER toolflow official documentation
should mention this problem, if -- for no other reason -- CASPER
doesn't have a mechanism to check whether the current SLX filename has
been changed
These LUT errors occur in the later stages of implementation, during the
"Logical Optimization" stages. The blocks in the design which invoke
the missing logic LUT error are random, and seem to be related to the
order in which optimizer selects blocks for optimizing. For example, if
the offending block is removed, the LUT error will migrate to some other
-- often unrelated -- block in a different portion of the overall
design. If that new offending block is removed, the LUT error migrates
to yet another block, and so on ad infinitum.
We might ask why this occurs. A name-changed SLX survives completely
through the synthesis stage of jasper compile, making the error
unusually pernicious.
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