Hi, Bartolome;
I own an HP41CX and when I execute [SHIF][CAT]4 and there is no file in the extended memory, the message is DIR EMPTY instead of FL NOT FOUND. FL NOT FOUND is standard for GETAS and SAVEAS, X-Functions that use HPIL mass storage devives for retrieving and saving ASCII files. I'd suggest a Master Clear procedure: [ON][CLx] and wait for MEMORY LOST in the display. If the problem persists, another possible procedure would be using the ROM (module) with tests to find what is going on. The third option would be www.fixthatcalc.com.
About DDAYS generating OUT OF RANGE error message. The weirdest of all is that OUT OF RANGE applies only to T+X and DATE+ when resulting values are actually out of range. If you set either DMY (execute it with [XEQ][ALPHA] DMY [ALPHA]) or MDY prior to execute any date-related operation and values are not accordingly, DATA ERROR is the related error message, not OUT OF RANGE. This I actually don't understand.
Is there any chance that your HP41CX has been hacked and it has extra functionality? The only explanation I can find (at least in a brief reasoning) for this behavior, considering that the calculator is working properly, is that there are user programs with these very names already stored in memory. In this case, RAM is searched first for any possible executable, which allows custom programs with the same name as functions to be executed first.
Anyway, none of the above explains FL NOT FOUND after CAT 4 with an empty extended memory...
Not so much of help, I now, just additional info.
Let us know what comes next; I hope you succeed fixing your HP41CX.
Cheers.
Luiz (Brazil)
Edited: 2 Feb 2005, 9:41 p.m.
