PaulS + others,
Thanks for helping out. Allow me to clarify: I've mounted the various weather probes onto the Adafruit GPS + SD logger, which is mounted to an Arduino UNO. Both codes work when I upload them separately, one pulls data from the probes (multiprobe), the other pulls GPS data and stores it into a .txt file on an SD card(sd_log.) When I try to combine both sketches together, the problem comes when in line 2, when I try to import Wire.h . Here's a sample code to help you ID the issue.
codeforPaulS.ino (4.77 KB)