any suggestions on this error?

Error in matrix(unlist(value, recursive = FALSE, use.names = FALSE), nrow =
nr,  : 
  invalid 'ncol' value (too large or NA)

the statement was:
for (i in v) {for (j in m[0,]){if(v[i]==m[0,j]){M[,-j]}}} 


where 'v' is a vector, and 'm' and 'M' are both matrices.

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