lee@sp3tmp1:ls *.png 'a b.png' c.png lee@sp3tmp1:for f in *png; do convert $f $(echo $f | sed 's/png$/web'); done convert-im6.q16: unable to open

lee@sp3tmp1:ls *.png 'a b.png' c.png lee@sp3tmp1:for f in *png; do convert $f $(echo $f | sed 's/png$/web'); done convert-im6.q16: unable to open image `a': No such file or directory @ error/blob.c/OpenBlob/2924. convert-im6.q16: no decode delegate for this image format `' @ error/constitute.c/ReadImage/575. convert-im6.q16: unable to open image `b.png': No such file or directory @ error/blob.c/OpenBlob/2924. convert-im6.q16: unable to open image `b.png': No such file or directory @ error/blob.c/OpenBlob/2924. convert-im6.q16: no decode delegate for this image format `' @ error/constitute.c/ReadImage/575. convert-im6.q16: no images defined `b.webp' @ error/convert.c/ConvertImageCommand/3229. [etc.] I think you could be making a more complicated point.